{"id":7402,"date":"2026-11-02T07:07:32","date_gmt":"2026-11-02T07:07:32","guid":{"rendered":"https:\/\/ksquareinstitute.in\/blog\/?p=7402"},"modified":"2026-11-02T07:07:33","modified_gmt":"2026-11-02T07:07:33","slug":"rotational-motion-neet-pyq-analysis","status":"publish","type":"post","link":"https:\/\/ksquareinstitute.in\/blog\/rotational-motion-neet-pyq-analysis\/","title":{"rendered":"Rotational Motion NEET PYQ Analysis: Moment of Inertia, Torque and Angular Momentum"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Quick answer:<\/strong> A rotational motion NEET PYQ analysis shows that NTA asks about two questions a year from System of Particles and Rotational Motion, and they come from five areas: moment of inertia (standard values, parallel and perpendicular axes theorems, radius of gyration), conservation of angular momentum, rotational kinematics, centre of mass, and torque with equilibrium of rigid bodies. The 2024, 2025 and 2026 papers all asked moment of inertia questions.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"572\" src=\"https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/11\/Rotational-Motion-NEET-PYQ-Analysis-Spinning-Skater-1024x572.webp\" alt=\"Rotational motion NEET PYQ analysis showing a spinning skater, a rotating bicycle wheel and a merry-go-round\" class=\"wp-image-7403\" srcset=\"https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/11\/Rotational-Motion-NEET-PYQ-Analysis-Spinning-Skater-1024x572.webp 1024w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/11\/Rotational-Motion-NEET-PYQ-Analysis-Spinning-Skater-300x167.webp 300w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/11\/Rotational-Motion-NEET-PYQ-Analysis-Spinning-Skater-768x429.webp 768w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/11\/Rotational-Motion-NEET-PYQ-Analysis-Spinning-Skater-1536x857.webp 1536w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/11\/Rotational-Motion-NEET-PYQ-Analysis-Spinning-Skater-2048x1143.webp 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This guide breaks down what NTA repeats, the formulas you must know and solved PYQ-pattern numericals. Before you start, get the bigger picture from our <a href=\"https:\/\/ksquareinstitute.in\/blog\/neet-2027-physics-preparation\">complete NEET Physics strategy<\/a>, and follow official exam news on our <a href=\"https:\/\/ksquareinstitute.in\/blog\/neet-2027-latest-updates\">NEET 2027 latest updates<\/a> page.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Want to test yourself first? <a href=\"https:\/\/ksquareinstitute.com\/questions\/neet-previous-year-questions\/physics\/system-of-particles-and-rotational-motion\/questions\/\" target=\"_blank\" rel=\"noopener\">Solve the Rotational Motion PYQs<\/a> for free, then use this guide to fix the gaps.<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#why-rotational-motion-deserves-extra-time\">Why Rotational Motion Deserves Extra Time<\/a><\/li><li><a href=\"#rotational-motion-neet-pyq-analysis-what-nta-repeats\">Rotational Motion NEET PYQ Analysis: What NTA Repeats<\/a><\/li><li><a href=\"#moment-of-inertia-the-table-to-memorise\">Moment of Inertia: The Table to Memorise<\/a><\/li><li><a href=\"#angular-momentum-and-its-conservation\">Angular Momentum and Its Conservation<\/a><\/li><li><a href=\"#rotational-kinematics\">Rotational Kinematics<\/a><\/li><li><a href=\"#centre-of-mass\">Centre of Mass<\/a><\/li><li><a href=\"#torque-and-equilibrium-of-rigid-bodies\">Torque and Equilibrium of Rigid Bodies<\/a><\/li><li><a href=\"#linear-vs-rotational-motion\">Linear vs Rotational Motion<\/a><\/li><li><a href=\"#a-note-on-rolling-motion\">A Note on Rolling Motion<\/a><\/li><li><a href=\"#worked-pyq-pattern-questions\">Worked PYQ-Pattern Questions<\/a><\/li><li><a href=\"#common-traps-in-this-chapter\">Common Traps in This Chapter<\/a><\/li><li><a href=\"#practise-every-rotational-motion-pyq\">Practise Every Rotational Motion PYQ<\/a><\/li><li><a href=\"#conclusion\">Conclusion<\/a><\/li><li><a href=\"#\u2753-faq\">FAQ<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 id=\"why-rotational-motion-deserves-extra-time\" class=\"wp-block-heading\">Why Rotational Motion Deserves Extra Time<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The chapter has about 100 past questions, and many students fear it. In practice, this rotational motion NEET PYQ analysis shows that most questions use one table of moments of inertia, the parallel axis theorem and three or four relations. For chapter notes, use our <a href=\"https:\/\/ksquareinstitute.in\/blog\/system-of-particles-and-rotational-motion-class-11-notes\">Rotational Motion class 11 notes<\/a>, and for a quick warm-up, try these <a href=\"https:\/\/ksquareinstitute.in\/blog\/top-5-rotational-motion-questions\">five quick Rotational Motion questions<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rolling motion was removed from the rationalised NCERT book; our article on <a href=\"https:\/\/ksquareinstitute.in\/blog\/rolling-motion-in-neet-syllabus-2027\">rolling motion NEET syllabus<\/a> explains what is in and out. Planning your year? Our guide to the <a href=\"https:\/\/ksquareinstitute.in\/blog\/neet-2027-registration-date\">NEET 2027 registration date<\/a> shows when the form is expected.<\/p>\n\n\n\n<h2 id=\"rotational-motion-neet-pyq-analysis-what-nta-repeats\" class=\"wp-block-heading\">Rotational Motion NEET PYQ Analysis: What NTA Repeats<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When you sort the past NEET physics PYQs from this chapter, five question types cover nearly everything.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Question type<\/th><th class=\"has-text-align-center\" data-align=\"center\">Frequency<\/th><th>What it tests<\/th><\/tr><\/thead><tbody><tr><td>Moment of inertia<\/td><td class=\"has-text-align-center\" data-align=\"center\">Most frequent<\/td><td>Standard values, parallel and perpendicular axes theorems, radius of gyration, bodies with cavities<\/td><\/tr><tr><td>Angular momentum<\/td><td class=\"has-text-align-center\" data-align=\"center\">Very frequent<\/td><td>L = I\u03c9, conservation, effect on kinetic energy<\/td><\/tr><tr><td>Rotational kinematics<\/td><td class=\"has-text-align-center\" data-align=\"center\">Very frequent<\/td><td>Angular velocity, acceleration, number of revolutions<\/td><\/tr><tr><td>Centre of mass<\/td><td class=\"has-text-align-center\" data-align=\"center\">Regular<\/td><td>Two-particle systems, motion of the centre of mass under internal forces<\/td><\/tr><tr><td>Torque and equilibrium<\/td><td class=\"has-text-align-center\" data-align=\"center\">Regular<\/td><td>\u03c4 = r \u00d7 F, principle of moments, rigid body equilibrium<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"moment-of-inertia-the-table-to-memorise\" class=\"wp-block-heading\">Moment of Inertia: The Table to Memorise<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Body<\/th><th>Axis<\/th><th class=\"has-text-align-center\" data-align=\"center\">Moment of inertia<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Ring<\/td><td>Through centre, perpendicular to its plane<\/td><td class=\"has-text-align-center\" data-align=\"center\">MR\u00b2<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Ring<\/td><td>About a diameter<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u00bdMR\u00b2<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Disc<\/td><td>Through centre, perpendicular to its plane<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u00bdMR\u00b2<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Disc<\/td><td>About a diameter<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u00bcMR\u00b2<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Solid sphere<\/td><td>About a diameter<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u2156MR\u00b2<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Hollow sphere<\/td><td>About a diameter<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u2154MR\u00b2<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Thin rod<\/td><td>Through centre, perpendicular to length<\/td><td class=\"has-text-align-center\" data-align=\"center\">ML\u00b2\/12<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Thin rod<\/td><td>Through one end, perpendicular to length<\/td><td class=\"has-text-align-center\" data-align=\"center\">ML\u00b2\/3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Radius of gyration (K):<\/strong> I = MK\u00b2. For a ring about its axis, K = R; for a disc about its axis, K = R\/\u221a2; for a rod about its centre, K = L\/\u221a12.<\/p>\n\n\n\n<h3 id=\"parallel-and-perpendicular-axes-theorems\" class=\"wp-block-heading\">Parallel and Perpendicular Axes Theorems<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Parallel axis theorem:<\/strong> I = Icm + Md\u00b2, where Icm is the moment of inertia about a parallel axis through the centre of mass and d is the distance between the two axes. It works for any body.<\/li>\n\n\n\n<li><strong>Perpendicular axis theorem:<\/strong> for a <strong>flat (planar) body only<\/strong>, Iz = Ix + Iy, where x and y lie in the plane of the body and z is perpendicular to it.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These two theorems turn the standard values into almost any answer NEET asks. For example, a ring about a tangent in its plane has I = \u00bdMR\u00b2 + MR\u00b2 = 3\/2 MR\u00b2.<\/p>\n\n\n\n<h2 id=\"angular-momentum-and-its-conservation\" class=\"wp-block-heading\">Angular Momentum and Its Conservation<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th>Relation<\/th><th>Meaning<\/th><\/tr><\/thead><tbody><tr><td>L = r \u00d7 p<\/td><td>Angular momentum of a particle<\/td><\/tr><tr><td>L = I\u03c9<\/td><td>Angular momentum of a rigid body<\/td><\/tr><tr><td>\u03c4 = dL\/dt<\/td><td>Torque is the rate of change of angular momentum<\/td><\/tr><tr><td>I\u03c9 = constant<\/td><td>When the external torque is zero, angular momentum is conserved<\/td><\/tr><tr><td>KE = \u00bdI\u03c9\u00b2 = L\u00b2\/2I<\/td><td>Rotational kinetic energy<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Conservation of angular momentum<\/strong> explains why an ice skater or ballet dancer spins faster when pulling the arms in: I falls, so \u03c9 rises. Because KE = L\u00b2\/2I, the kinetic energy increases when I decreases, with the extra energy coming from the work done by the dancer&#8217;s muscles.<\/p>\n\n\n\n<h2 id=\"rotational-kinematics\" class=\"wp-block-heading\">Rotational Kinematics<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For constant angular acceleration \u03b1:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u03c9 = \u03c9\u2080 + \u03b1t<\/li>\n\n\n\n<li>\u03b8 = \u03c9\u2080t + \u00bd\u03b1t\u00b2<\/li>\n\n\n\n<li>\u03c9\u00b2 = \u03c9\u2080\u00b2 + 2\u03b1\u03b8<\/li>\n\n\n\n<li>Number of revolutions = \u03b8\/2\u03c0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Other relations: work done by a torque = \u03c4\u03b8, and power = \u03c4\u03c9.<\/p>\n\n\n\n<h2 id=\"centre-of-mass\" class=\"wp-block-heading\">Centre of Mass<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>For two particles: x(cm) = (m\u2081x\u2081 + m\u2082x\u2082)\/(m\u2081 + m\u2082).<\/li>\n\n\n\n<li><strong>Internal forces cannot change the motion of the centre of mass.<\/strong> If a shell explodes in mid-air, its centre of mass keeps moving along the same parabola.<\/li>\n\n\n\n<li>M \u00d7 a(cm) = total external force. When the external force is zero, the total linear momentum of the system is conserved.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"torque-and-equilibrium-of-rigid-bodies\" class=\"wp-block-heading\">Torque and Equilibrium of Rigid Bodies<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Torque:<\/strong> \u03c4 = r \u00d7 F, with magnitude \u03c4 = rF sin\u03b8.<\/li>\n\n\n\n<li>A rigid body is in <strong>mechanical equilibrium<\/strong> when the net external force and the net external torque are both zero.<\/li>\n\n\n\n<li><strong>Principle of moments (lever):<\/strong> load \u00d7 load arm = effort \u00d7 effort arm.<\/li>\n\n\n\n<li>A <strong>couple<\/strong> is a pair of equal and opposite forces with different lines of action; it produces rotation without translation.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"linear-vs-rotational-motion\" class=\"wp-block-heading\">Linear vs Rotational Motion<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-white-background-color has-background has-border-color has-black-border-color\" style=\"border-width:2px\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Linear motion<\/th><th class=\"has-text-align-center\" data-align=\"center\">Rotational motion<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Displacement x<\/td><td class=\"has-text-align-center\" data-align=\"center\">Angular displacement \u03b8<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Velocity v<\/td><td class=\"has-text-align-center\" data-align=\"center\">Angular velocity \u03c9<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Acceleration a<\/td><td class=\"has-text-align-center\" data-align=\"center\">Angular acceleration \u03b1<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Mass m<\/td><td class=\"has-text-align-center\" data-align=\"center\">Moment of inertia I<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Force F = ma<\/td><td class=\"has-text-align-center\" data-align=\"center\">Torque \u03c4 = I\u03b1<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Linear momentum p = mv<\/td><td class=\"has-text-align-center\" data-align=\"center\">Angular momentum L = I\u03c9<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Kinetic energy \u00bdmv\u00b2<\/td><td class=\"has-text-align-center\" data-align=\"center\">Kinetic energy \u00bdI\u03c9\u00b2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"a-note-on-rolling-motion\" class=\"wp-block-heading\">A Note on Rolling Motion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Rolling is not in the current syllabus, but NEET 2024 still had a rolling question. Keep two results as low-priority revision: the kinetic energy of a rolling body is \u00bdmv\u00b2(1 + K\u00b2\/R\u00b2), and when bodies roll down the same incline, the solid sphere reaches the bottom first, then the disc, then the ring.<\/p>\n\n\n\n<h2 id=\"worked-pyq-pattern-questions\" class=\"wp-block-heading\">Worked PYQ-Pattern Questions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q1. The moment of inertia of a ring of mass M and radius R about its diameter is:<\/strong> (a) MR\u00b2 (b) \u00bdMR\u00b2 (c) \u00bcMR\u00b2 (d) 2MR\u00b2<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: (b) \u00bdMR\u00b2.<\/strong> By the perpendicular axis theorem, Ix + Iy = MR\u00b2 and Ix = Iy, so each is \u00bdMR\u00b2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q2. A wheel starts from rest with an angular acceleration of 2 rad\/s\u00b2. How many revolutions does it make in 10 s?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u03b8 = \u00bd\u03b1t\u00b2 = \u00bd \u00d7 2 \u00d7 10\u00b2 = 100 rad. Revolutions = 100\/2\u03c0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: About 15.9 revolutions.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q3. Using the parallel axis theorem, find the moment of inertia of a thin rod about one end.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I = ML\u00b2\/12 + M(L\/2)\u00b2 = ML\u00b2\/12 + ML\u00b2\/4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: ML\u00b2\/3.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q4. An ice skater pulls in her arms, halving her moment of inertia. What happens to her angular velocity and kinetic energy?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Angular momentum is conserved, so \u03c9 doubles. KE = L\u00b2\/2I, so with L constant and I halved, KE doubles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: Angular velocity doubles; kinetic energy doubles.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q5. The radius of gyration of a disc about its own axis is:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: R\/\u221a2,<\/strong> since I = \u00bdMR\u00b2 = MK\u00b2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q6. A shell explodes in mid-air. What happens to the path of its centre of mass?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Answer: It continues along the same parabola,<\/strong> because the forces of the explosion are internal.<\/p>\n\n\n\n<h2 id=\"common-traps-in-this-chapter\" class=\"wp-block-heading\">Common Traps in This Chapter<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Using the perpendicular axis theorem for a solid sphere (it applies only to flat bodies)<\/li>\n\n\n\n<li>Writing ML\u00b2\/12 for a rod about its end (that is about its centre)<\/li>\n\n\n\n<li>Saying kinetic energy stays constant when a skater pulls in her arms (angular momentum stays constant; KE rises)<\/li>\n\n\n\n<li>Forgetting to divide by 2\u03c0 when converting radians to revolutions<\/li>\n\n\n\n<li>Thinking an explosion changes the path of the centre of mass<\/li>\n\n\n\n<li>Mixing up \u00bdMR\u00b2 (disc about its axis) with \u00bcMR\u00b2 (disc about a diameter)<\/li>\n<\/ul>\n\n\n\n<h2 id=\"practise-every-rotational-motion-pyq\" class=\"wp-block-heading\">Practise Every Rotational Motion PYQ<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This rotational motion NEET PYQ analysis shows you where the marks are. Solving real past questions makes the formulas automatic. Every System of Particles and Rotational Motion previous year question is available chapter-wise, free:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 <strong><a href=\"https:\/\/ksquareinstitute.com\/questions\/neet-previous-year-questions\/physics\/system-of-particles-and-rotational-motion\/\" target=\"_blank\" rel=\"noopener\">Solve all Rotational Motion NEET PYQs<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Keep the moment of inertia table beside you for the first round, then solve the second round without it.<\/p>\n\n\n\n<h2 id=\"conclusion\" class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Rotational Motion looks hard, but most of its questions come from one table and a few relations. Use this rotational motion NEET PYQ analysis to master moments of inertia and the two axes theorems, angular momentum and its conservation, rotational kinematics, centre of mass and torque. Then solve the past numericals until each one takes under a minute.<\/p>\n\n\n\n<h2 id=\"\u2753-faq\" class=\"wp-block-heading\">\u2753 FAQ<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: How many questions come from Rotational Motion in NEET?<\/strong> A: Usually about two questions a year from System of Particles and Rotational Motion.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: What is the most important topic in Rotational Motion for NEET?<\/strong> A: Moment of inertia, including standard values and the parallel and perpendicular axes theorems, followed by conservation of angular momentum.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Is rolling motion in the NEET 2027 syllabus?<\/strong> A: It is not in the current syllabus or the rationalised NCERT book, but a rolling question did appear in 2024, so keep the basic results as low-priority revision.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: When does the perpendicular axis theorem apply?<\/strong> A: Only to flat (planar) bodies such as rings, discs and plates, where Iz = Ix + Iy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Why does a spinning skater speed up when she pulls her arms in?<\/strong> A: Her moment of inertia decreases, and since angular momentum I\u03c9 is conserved, her angular velocity increases.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Where can I practise Rotational Motion NEET PYQs for free?<\/strong> A: You can solve every Rotational Motion previous year question chapter-wise for free using the practice links in this article.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quick answer: A rotational motion NEET PYQ analysis shows that NTA asks about two questions a year from System of Particles and Rotational Motion, and they come from five areas: moment of inertia (standard values, parallel and perpendicular axes theorems, radius of gyration), conservation of angular momentum, rotational kinematics, centre of mass, and torque with [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7403,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,68,2],"tags":[3233,3240,603,3232,7,4008,13,2328,3231,3236,3238,4248,3235,3237],"class_list":["post-7402","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-study-tips","category-biology","category-neet","tag-angular-momentum","tag-centre-of-mass","tag-class-11-physics","tag-moment-of-inertia","tag-neet-2027","tag-neet-chapter-wise-pyq","tag-neet-physics","tag-neet-pyq","tag-parallel-axis-theorem","tag-perpendicular-axis-theorem","tag-radius-of-gyration","tag-rotational-motion","tag-system-of-particles","tag-torque"],"_links":{"self":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/7402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/comments?post=7402"}],"version-history":[{"count":1,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/7402\/revisions"}],"predecessor-version":[{"id":7404,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/7402\/revisions\/7404"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/media\/7403"}],"wp:attachment":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/media?parent=7402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/categories?post=7402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/tags?post=7402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}