{"id":2499,"date":"2026-05-28T17:15:18","date_gmt":"2026-05-28T11:45:18","guid":{"rendered":"https:\/\/mymockmate.com\/notes\/?p=2499"},"modified":"2026-07-15T17:40:41","modified_gmt":"2026-07-15T12:10:41","slug":"ncert-class-9-science-how-forces-affect-motion-newtons-laws-explained","status":"publish","type":"post","link":"https:\/\/mymockmate.com\/notes\/ncert-class-9-science-how-forces-affect-motion-newtons-laws-explained\/","title":{"rendered":"NCERT Class 9 Science Chapter 6 How Forces Affect Motion \u2013 Newton\u2019s Laws Explained"},"content":{"rendered":"<div class=\"mymoc-top mymoc-entity-placement\" id=\"mymoc-559330716\"><div id=\"mymoc-91811446\"><a href=\"https:\/\/amzn.to\/4ehRB6n\" aria-label=\"printers\"><img src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/printers.png\" alt=\"\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/printers.png 1303w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/printers-300x73.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/printers-1024x250.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/printers-768x187.png 768w\" sizes=\"(max-width: 1303px) 100vw, 1303px\" width=\"1303\" height=\"318\"><\/a><\/div><\/div><div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-bottom-right\"><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2499?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\"><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Print<\/span><\/a> <span class=\"pdfprnt-count-generation\">12<\/span><\/div>\n<p class=\"wp-block-paragraph\"><strong>Short Intro:<\/strong><br>This chapter explores how forces affect motion, focusing on Newton&rsquo;s three laws, friction, and real-world applications. Learn how balanced and unbalanced forces influence objects, and practice step-by-step solutions for various problems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quick Information Box:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chapter:<\/strong> 6 &ndash; How Forces Affect Motion<\/li>\n\n\n\n<li><strong>Class:<\/strong> 9<\/li>\n\n\n\n<li><strong>Key Topics:<\/strong> Force, Friction, Newton&rsquo;s Laws of Motion, Acceleration, Mass, Systems of Objects<\/li>\n\n\n\n<li><strong>Unit of Force:<\/strong> Newton (N)<\/li>\n\n\n\n<li><strong>Key Concept:<\/strong> Force produces acceleration and occurs in action-reaction pairs<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Concepts Used (Topics Covered):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Definition of Force<\/li>\n\n\n\n<li>Measuring Force with Spring Balance<\/li>\n\n\n\n<li>Balanced and Unbalanced Forces<\/li>\n\n\n\n<li>Friction: Static and Kinetic<\/li>\n\n\n\n<li>Newton&rsquo;s First Law (Law of Inertia)<\/li>\n\n\n\n<li>Newton&rsquo;s Second Law (F = ma)<\/li>\n\n\n\n<li>Newton&rsquo;s Third Law (Action-Reaction)<\/li>\n\n\n\n<li>Systems of Objects and Tension Forces<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Important Formulas:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Net Force: <math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>F<\/mi><mtext>net<\/mtext><\/msub><mo>=<\/mo><mi>m<\/mi><mi>a<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">F_\\text{net} = ma<\/annotation><\/semantics><\/math><\/li>\n\n\n\n<li>Gravitational Force: <math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>F<\/mi><mo>=<\/mo><mi>m<\/mi><mi>g<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">F = mg<\/annotation><\/semantics><\/math><\/li>\n\n\n\n<li>Acceleration from Kinematics: <math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>a<\/mi><mo>=<\/mo><mfrac><mrow><mi>v<\/mi><mo>&minus;<\/mo><mi>u<\/mi><\/mrow><mi>t<\/mi><\/mfrac><\/mrow><annotation encoding=\"application\/x-tex\">a = \\frac{v-u}{t}<\/annotation><\/semantics><\/math><\/li>\n\n\n\n<li>Force from Momentum: <math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>F<\/mi><mo>=<\/mo><mfrac><mrow><mi mathvariant=\"normal\">&Delta;<\/mi><mi>p<\/mi><\/mrow><mrow><mi mathvariant=\"normal\">&Delta;<\/mi><mi>t<\/mi><\/mrow><\/mfrac><\/mrow><annotation encoding=\"application\/x-tex\">F = \\frac{\\Delta p}{\\Delta t}<\/annotation><\/semantics><\/math><\/li>\n<\/ul>\n\n\n\n<p class=\"has-luminous-vivid-orange-color has-text-color has-link-color has-large-font-size wp-elements-41f6d507f519ca26d6900af83d6fa697 wp-block-paragraph\"><strong>Think It Over<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Why does a canoe move forward when the canoeist pushes water backwards with their paddle and why does it move<br>faster when they  push harder?<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-212-1024x683.png\" alt=\"image\" class=\"wp-image-3679\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-212-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-212-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-212-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-212.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">2. Suppose the same canoeist uses the same paddle force in two different canoes, one empty and one carrying another passenger. In which case will the canoe move faster?<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-214-1024x683.png\" alt=\"image\" class=\"wp-image-3681\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-214-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-214-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-214-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-214.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<div class=\"internal-linking-related-contents\"><a href=\"https:\/\/mymockmate.com\/notes\/class-9-maths-exercise-1-1-solutions-coordinate-geometry-ncert-solutions\/\" class=\"template-2\"><span class=\"cta\">Related Topic to Read more<\/span><span class=\"postTitle\">NCERT Class 9 Maths Exercise 1.1 Solutions | Coordinate Geometry NCERT Solutions<\/span><\/a><\/div><p class=\"has-luminous-vivid-orange-color has-text-color has-link-color has-large-font-size wp-elements-0250a5a795f51a29c950dcef4367bd0f wp-block-paragraph\"><strong>Pause and Ponder<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>A weightlifter lifts a barbell (Fig. 6.8). List two forces that are acting on the barbell. Are these forces balanced if the  weightlifter keeps the barbell steady?<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"249\" height=\"203\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-213.png\" alt=\"image\" class=\"wp-image-3680\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-216-1024x819.png\" alt=\"image\" class=\"wp-image-3685\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-216-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-216-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-216-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-216.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">2. Two players R and S are participating in an arm-wrestling match (Fig. 6.9). At the instant, when the arms tilt to the front direction (out of the page towards you), are the forces exerted by the players balanced? If not, which player exerted the  larger force<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"220\" height=\"180\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-215.png\" alt=\"image\" class=\"wp-image-3684\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-217-1024x819.png\" alt=\"image\" class=\"wp-image-3686\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-217-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-217-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-217-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-217.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">3. An object is moving with a constant velocity. Is there a net force acting upon it?<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-218-1024x819.png\" alt=\"image\" class=\"wp-image-3687\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-218-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-218-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-218-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-218.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>Suppose, no net force is acting on an object. Which of the following situations are possible?<br>(i) Object remains at rest if at rest.<br>(ii) Object keeps moving with a constant velocity if already moving.<br>(iii) Object is moving with a constant acceleration<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-220-1024x683.png\" alt=\"image\" class=\"wp-image-3689\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-220-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-220-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-220-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-220.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li>In the real world, it is difficult to find a situation where no forces are acting on an object. But by applying additional forces, a condition can be achieved where the net force on the object is zero. Explain with the help of an example.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-221-1024x683.png\" alt=\"image\" class=\"wp-image-3690\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-221-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-221-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-221-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-221.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"6\" class=\"wp-block-list\">\n<li>A toy car of mass 100 g is moving with a constant velocity of 0.5 m s&ndash;1. What is the net force acting on the toy car?<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-222-1024x819.png\" alt=\"image\" class=\"wp-image-3692\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-222-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-222-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-222-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-222.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"7\" class=\"wp-block-list\">\n<li>Two children of different masses are sitting on identical swings. To impart identical initial acceleration, for which child would you require to apply a larger force? Explain why.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-223-1024x683.png\" alt=\"image\" class=\"wp-image-3694\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-223-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-223-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-223-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-223.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"8\" class=\"wp-block-list\">\n<li>How are glass items packed for transportation using a bubble wrap or hay protected from damage?<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-224-1024x683.png\" alt=\"image\" class=\"wp-image-3695\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-224-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-224-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-224-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-224.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"9\" class=\"wp-block-list\">\n<li>Why does a fireperson sometimes struggle when holding the pipe issuing water?<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-225-1024x683.png\" alt=\"image\" class=\"wp-image-3696\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-225-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-225-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-225-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-225.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"10\" class=\"wp-block-list\">\n<li>Suppose a spacecraft is moving in a region of space where the gravitational force acting upon it is negligible. Suggest how can it change its velocity.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-226-1024x683.png\" alt=\"image\" class=\"wp-image-3697\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-226-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-226-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-226-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-226.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p class=\"has-luminous-vivid-orange-color has-text-color has-link-color has-x-large-font-size wp-elements-d465d1f9be2a6a9e103ffd765c15cfbb wp-block-paragraph\"><strong>Revise, Reflect, Refine<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Using a horizontal force F, a table is moved across the floor at a constant velocity. How much is the frictional force exerted by the floor on the table?<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-227-1024x819.png\" alt=\"image\" class=\"wp-image-3700\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-227-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-227-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-227-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-227.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>For a ball moving on a smooth frictionless surface, choose the appropriate option that will make the following statements physically correct.<br>(i) If no net force is applied on the ball, the velocity of the ball will remain the same\/increase\/decrease.<br>(ii) If a net force is applied on the ball in the direction of its motion, the magnitude of the velocity of the ball will remain the same\/ increase\/decrease.<br>(iii) If a net force is applied on the ball in a direction opposite to the direction of its motion, the magnitude of the velocity of the ball will remain the same\/increase\/decrease.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"859\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-229-859x1024.png\" alt=\"image\" class=\"wp-image-3702\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-229-859x1024.png 859w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-229-252x300.png 252w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-229-768x915.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-229.png 1149w\" sizes=\"(max-width: 859px) 100vw, 859px\"><\/figure>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>Two blocks P and Q on a smooth horizontal surface are shown in Fig. 6.36a and Fig. 6.36b. Two forces of magnitudes 4 N and 5 N are acting in opposite directions on block P, while block Q is moving with a constant velocity.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"388\" height=\"118\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-228.png\" alt=\"image\" class=\"wp-image-3701\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-228.png 388w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-228-300x91.png 300w\" sizes=\"(max-width: 388px) 100vw, 388px\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Which of the following statement is correct?<br>(i) P experiences a net force and Q does not experience a net force.<br>(ii) P does not experience a net force and Q experiences a net force.<br>(iii) Both P and Q experience a net force.<br>(iv) Neither P nor Q experiences a net force.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-230-1024x683.png\" alt=\"image\" class=\"wp-image-3703\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-230-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-230-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-230-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-230.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li>While practising for the snake boat race (Vallum kalli in Kerala), 100 oarsmen are rowing a boat together. Out of these, 95 row backwards to propel the boat forward. But by mistake, 5 oarsmen row in the opposite direction. If each oarsman applies a horizontal force of 200 N, what is the net force on the snake boat? (Ignore drag forces, air friction, etc.)<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-231-1024x683.png\" alt=\"image\" class=\"wp-image-3704\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-231-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-231-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-231-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-231.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li>When a net force acts on an object, we observe that the object accelerates:&thinsp;<br>(i) opposite to the direction of force, with acceleration proportional to the force acting on the object.<br>(ii) opposite to the direction of force, with acceleration proportional to the mass of the object.<br>(iii) in the direction of force, with acceleration inversely proportional to the force acting on the object.<br>(iv) in the direction of force, with acceleration proportional to the force acting on the object.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-233-1024x819.png\" alt=\"image\" class=\"wp-image-3706\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-233-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-233-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-233-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-233.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"6\" class=\"wp-block-list\">\n<li>The position-time graph for four objects A, B, C and D moving along a straight line are given in Fig. 6.37. A net force  acts on:<br>(i) Object A<br>(ii) Object B<br>(iii) Object C<br>(iv) Object D<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"837\" height=\"222\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-232.png\" alt=\"image\" class=\"wp-image-3705\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-232.png 837w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-232-300x80.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-232-768x204.png 768w\" sizes=\"(max-width: 837px) 100vw, 837px\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ol start=\"7\" class=\"wp-block-list\">\n<li>A sailor jumps out from a small boat to the shore (Fig. 6.38). As the sailor jumps forward, will the boat move? If yes, in which direction and why.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"382\" height=\"297\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-235.png\" alt=\"image\" class=\"wp-image-3708\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-235.png 382w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-235-300x233.png 300w\" sizes=\"(max-width: 382px) 100vw, 382px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-237-1024x683.png\" alt=\"image\" class=\"wp-image-3710\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-237-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-237-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-237-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-237.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"8\" class=\"wp-block-list\">\n<li>During a high jump event, a landing mat or sand bed is placed for the athlete to fall upon (Fig. 6.39). Explain the reason behind it<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"406\" height=\"308\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-236.png\" alt=\"image\" class=\"wp-image-3709\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-236.png 406w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-236-300x228.png 300w\" sizes=\"(max-width: 406px) 100vw, 406px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-238-1024x683.png\" alt=\"image\" class=\"wp-image-3711\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-238-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-238-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-238-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-238.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"9\" class=\"wp-block-list\">\n<li>A hand cart loaded with vegetables collides with an identical but empty hand cart. During the collision:<br>(i) the loaded cart exerts a force of larger magnitude on the empty cart.<br>(ii) the empty cart exerts a force of larger magnitude on the loaded cart.<br>(iii) neither cart exerts a force on the other.<br>(iv) the loaded cart and the empty cart, both exert an equal magnitude of force on each other.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-240-1024x683.png\" alt=\"image\" class=\"wp-image-3713\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-240-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-240-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-240-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-240.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"10\" class=\"wp-block-list\">\n<li>The acceleration-mass graph for the acceleration produced by a force on objects of different masses is plotted in Fig. 6.40. Plot the force-mass graph for this case.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"333\" height=\"286\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-239.png\" alt=\"image\" class=\"wp-image-3712\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-239.png 333w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-239-300x258.png 300w\" sizes=\"(max-width: 333px) 100vw, 333px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-241-1024x683.png\" alt=\"image\" class=\"wp-image-3714\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-241-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-241-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-241-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-241.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"11\" class=\"wp-block-list\">\n<li>The velocity-time graph of an object of mass 10 kg moving along a straight line is shown in Fig. 6.41. Calculate the force acting on the object by using the graph.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"241\" height=\"300\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-242.png\" alt=\"image\" class=\"wp-image-3715\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"819\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-243-819x1024.png\" alt=\"image\" class=\"wp-image-3716\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-243-819x1024.png 819w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-243-240x300.png 240w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-243-768x960.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-243.png 1122w\" sizes=\"(max-width: 819px) 100vw, 819px\"><\/figure>\n\n\n\n<ol start=\"12\" class=\"wp-block-list\">\n<li>A bullet of mass 50 g moving with a speed of 100 m s&ndash;1 enters a heavy stationary wooden block and stops after penetrating a distance of 50 cm. Estimate the stopping force acting on the bullet (assume that the bullet undergoes constant acceleration within the block).<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-244-1024x683.png\" alt=\"image\" class=\"wp-image-3717\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-244-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-244-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-244-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-244.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"13\" class=\"wp-block-list\">\n<li>An ace footballer converted a penalty shot by kicking the football with a speed of 108 km h&ndash;1. The estimated force they imparted was 800 N. The mass of the football was 0.4 kg. Calculate the time of contact between their foot and the ball.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"877\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-245-877x1024.png\" alt=\"image\" class=\"wp-image-3718\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-245-877x1024.png 877w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-245-257x300.png 257w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-245-768x897.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-245.png 1160w\" sizes=\"(max-width: 877px) 100vw, 877px\"><\/figure>\n\n\n\n<ol start=\"14\" class=\"wp-block-list\">\n<li>An object of mass 2 kg moving with a constant velocity of 10 m s&ndash;1 encounters a rough patch where the force of friction on the object is 7 N. At the same time, an additional constant force of 3 N opposing the motion is applied on the object. After entering the rough patch, how much distance does the object travel before coming to rest?<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-246-1024x683.png\" alt=\"image\" class=\"wp-image-3719\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-246-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-246-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-246-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-246.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<ol start=\"15\" class=\"wp-block-list\">\n<li>A tractor pulls a harrow (a ploughing tool) of mass m1 with a net force F resulting in an acceleration of a1 . The same tractor pulls a trolley of mass m2 with a force F producing an acceleration of a2 . If the tractor now pulls the trolley with the harrow placed on it (with the same force F ), then obtain an expression for the resulting acceleration in terms of a1 and a2 . Ignore friction.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"868\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-248-868x1024.png\" alt=\"image\" class=\"wp-image-3721\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-248-868x1024.png 868w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-248-254x300.png 254w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-248-768x906.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-248.png 1155w\" sizes=\"(max-width: 868px) 100vw, 868px\"><\/figure>\n\n\n\n<ol start=\"16\" class=\"wp-block-list\">\n<li>When the pole of a bar magnet is brought close to a magnetic compass, the bar magnet and the compass needle  which is also a magnet) exert a magnetic force on each other. As per Newton&rsquo;s third law of motion, both the forces are equal in magnitude and opposite in direction. However, the compass needle moves, whereas the bar magnet does<br>not move (Fig. 6.42). Explain why.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"219\" height=\"242\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-247.png\" alt=\"image\" class=\"wp-image-3720\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"859\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-250-859x1024.png\" alt=\"image\" class=\"wp-image-3723\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-250-859x1024.png 859w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-250-252x300.png 252w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-250-768x915.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-250.png 1149w\" sizes=\"(max-width: 859px) 100vw, 859px\"><\/figure>\n\n\n\n<div class=\"internal-linking-related-contents\"><a href=\"https:\/\/mymockmate.com\/notes\/class-9-maths-exercise-1-2-solutions-coordinate-geometry-ncert-solutions\/\" class=\"template-2\"><span class=\"cta\">Related Topic to Read more<\/span><span class=\"postTitle\">NCERT Class 9 Maths Exercise 1.2 Solutions | Coordinate Geometry NCERT Solutions<\/span><\/a><\/div><p class=\"wp-block-paragraph\"><strong>Common Mistakes:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Forgetting friction acts opposite to motion<\/li>\n\n\n\n<li>Confusing balanced vs unbalanced forces<\/li>\n\n\n\n<li>Neglecting mass when calculating acceleration<\/li>\n\n\n\n<li>Misinterpreting action-reaction pairs<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Exam Tips:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Always draw a free-body diagram<\/li>\n\n\n\n<li>Identify all forces before applying Newton&rsquo;s laws<\/li>\n\n\n\n<li>Check the direction of net force<\/li>\n\n\n\n<li>Use SI units consistently<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Practice MCQs:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Two forces 4 N and 5 N act on block P in opposite directions. Net force? (Answer: 1 N)<\/li>\n\n\n\n<li>A 0.1 kg bullet fired from 5 kg gun &rarr; recoil acceleration of gun? (Answer: <math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>a<\/mi><mo>=<\/mo><mi>F<\/mi><mi mathvariant=\"normal\">\/<\/mi><mi>m<\/mi><mo>=<\/mo><mn>0.4<\/mn><mtext>&thinsp;<\/mtext><mi>m<\/mi><mi mathvariant=\"normal\">\/<\/mi><msup><mi>s<\/mi><mn>2<\/mn><\/msup><\/mrow><annotation encoding=\"application\/x-tex\">a = F\/m = 0.4\\, m\/s^2<\/annotation><\/semantics><\/math><\/li>\n\n\n\n<li>Frictionless surface, net force = 0 &rarr; velocity? (Answer: constant)<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>FAQ Section:<\/strong><\/p><div class=\"mymoc-middle mymoc-entity-placement\" id=\"mymoc-2478417469\"><div id=\"mymoc-1912942693\"><a href=\"https:\/\/amzn.to\/4xnw9oY\" aria-label=\"head-phones\"><img src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/head-phones.png\" alt=\"\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/head-phones.png 1301w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/head-phones-300x80.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/head-phones-1024x274.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/head-phones-768x205.png 768w\" sizes=\"(max-width: 1301px) 100vw, 1301px\" width=\"1301\" height=\"348\"><\/a><\/div><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Q:<\/strong> Does a stationary object require a force to remain stationary?<br><strong>A:<\/strong> No, only to overcome friction or initiate motion.<\/li>\n\n\n\n<li><strong>Q:<\/strong> Can acceleration be zero if a force is applied?<br><strong>A:<\/strong> Only if net force = 0.<\/li>\n<\/ul>\n\n\n \n<div data-block=\"gutenkit\/dual-button\" data-post-id=\"2499\" id=\"block-0a2d0c96-bcf6-483c-9dd3-59b307585f80\" class=\"wp-block-gutenkit-dual-button gkit-dual-button-middle-text gkit585f80 gutenkit-block\"><div class=\"gkit-dual-btn-container\"><div class=\"gkit-dual-btn-wrapper\"><a class=\"gkit-dual-btn gkit-dual-btn-first\" href=\"https:\/\/mymockmate.com\/notes\/ncert-class-9-science-exploring-mixtures-and-their-separation-solutions\/\"><span class=\"gkit-dual-btn-text\">&lt;&lt; Chapter 5<\/span><\/a><span class=\"gkit-dual-btn-middle-text\">Or<\/span><a class=\"gkit-dual-btn gkit-dual-btn-second\" href=\"https:\/\/mymockmate.com\/notes\/ncert-class-9-science-work-energy-and-simple-machines-class-9-solutions\/\"><span class=\"gkit-dual-btn-text\">Chapter 7 &gt;&gt;<\/span><\/a><\/div><\/div><\/div>\n \n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-bottom-right\"><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2499?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\"><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Print<\/span><\/a> <span class=\"pdfprnt-count-generation\">12<\/span><\/div><div class=\"mymoc-bottom mymoc-entity-placement\" id=\"mymoc-4047375139\"><div id=\"mymoc-1765706092\"><a href=\"https:\/\/amzn.to\/4ehJfM4\" aria-label=\"students acessories\"><img src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/students-acessories.png\" alt=\"\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/students-acessories.png 1301w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/students-acessories-300x85.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/students-acessories-1024x290.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/students-acessories-768x218.png 768w\" sizes=\"(max-width: 1301px) 100vw, 1301px\" width=\"1080\" height=\"100\"><\/a><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p> 12 Short Intro:This chapter explores how forces affect motion, focusing on Newton&rsquo;s three laws, friction, and real-world applications. Learn how balanced and unbalanced forces&#8230;<\/p>\n","protected":false},"author":3,"featured_media":2508,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""},"footnotes":""},"categories":[4,12],"tags":[1341,1346,1343,1345,1340,1342,1344],"class_list":["post-2499","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-class-9","category-science","tag-acceleration","tag-class-9","tag-forces","tag-friction","tag-motion","tag-newtons-laws","tag-physics"],"featured_image_src":"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/NCERT-Class-9-Science-How-Forces-Affect-Motion-\u2013-Newtons-Laws-Explained.png","author_info":{"display_name":"Team Mymockmate (L)","author_link":"https:\/\/mymockmate.com\/notes\/author\/luckp\/"},"_links":{"self":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2499","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/comments?post=2499"}],"version-history":[{"count":9,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2499\/revisions"}],"predecessor-version":[{"id":6718,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2499\/revisions\/6718"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/media\/2508"}],"wp:attachment":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/media?parent=2499"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/categories?post=2499"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/tags?post=2499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}