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Physics - Rotational Motion

Practise 27 COMEDK previous year questions on Rotational Motion, compiled from papers spanning 2012 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty COMEDK tests.

Rotational Motion has been asked in 8 of the 15 years of COMEDK papers analysed (2012–2026), with 27 questions in all. 44% of them were easy, 48% moderate and 7% tough. Most of its questions came from 2024, with 7 questions that year. In the last three years (2024–2026) it had 16 questions across 9 papers, about 1.8 per paper.

The chapter's 6 topics are not weighted equally: Torque (8 questions, 30%), Angular momentum and Angular impulse (7 questions, 26%), and Rotational kinematics (5 questions, 19%) have been asked the most. Torque has also led over the last five years, with 7 questions. Rolling without Slipping has produced the most tough questions (1).

  1. 1A particle starts rotating from rest. The instantaneous angular displacement is , where is in radian and t in s; The angular velocity at s i09 May, 2026 (S1)Rotational kinematics
  2. 2Four masses each 2 kg are placed at the corners A, B, C, D of a mass less square frame. 40 kg mass is at the centre O of a square frame of s09 May, 2026 (S1)Moment of inertia of rigid bodies
  3. 3A bullet, fired into a door gets embedded exactly at it's centre, causing the door to rotate about it's vertical axis, practically without f09 May, 2026 (S2)Angular momentum and Angular impulse
  4. 4A singer, during his performance, stands on the edge of a circular turntable, and begins to walk along its edge with a speed of relative to 09 May, 2026 (S2)Angular momentum and Angular impulse
  5. 5A motor bike is moving with a speed of along a straight road. The radius of its wheel and its moment of inertia about the axis of rotation a25 May, 2025 (Shift)Torque
  6. 6A rigid body is said to be in rotational equilibrium:25 May, 2025 (Shift)Torque
  7. 7A force of acts at the origin of the coordinate system. The torque about the point is:10 May, 2025 (S1)Torque
  8. 8Applying a constant torque the speed of a flywheel is increased from 1800 rpm to 2400 rpm in 10 seconds. The number of revolutions made by t10 May, 2025 (S3)Rotational kinematics
  9. 9A point marked on a ring of radius 2 cm is in contact with a horizontal plane. Now the ring is rolled forward half a revolution along the po10 May, 2025 (S3)Rolling without Slipping
  10. 10A record player is spinning at an angular velocity of just before it is turned off. It then decelerates at a constant rate of . The angular 2024 (Afternoon Shift)Rotational kinematics
  11. 11A circular disc of mass , having radius is suspended by a wire attached to its centre. The wire is twisted by rotating the disc and released2024 (Afternoon Shift)Angular oscillations
  12. 12An object of mass is allowed to hang tangentially from the rim of the wheel of radius R. When released from the rest, the block falls vertic2024 (Afternoon Shift)Torque
  13. 13A solid cylinder of mass and radius is rotating about its own axis without friction with angular velocity . A particle of mass moving with a2024 (Evening Shift)Angular momentum and Angular impulse
  14. 14is the centre of an equilateral triangle . and are three forces acting along the sides and as shown in figure. What should be the magnitude 2024 (Memory Based)Torque
  15. 15Let and be moments of inertia of a body about two axes and , respectively. The axis passes through the centre of mass of the body but does n2024 (Memory Based)Moment of inertia of rigid bodies
  16. 16A body of mass at rest is rotated for with a constant moment of force . Find the work done if the moment of inertia of the body is .2024 (Morning Shift)Torque
  17. 17A wheel is free to rotate about a horizontal axis through O. A force of is applied at a point from the center . OP makes an angle of with ax2023 (Evening Shift)Torque
  18. 18A thin circular ring of mass and radius rotates about an axis through its centre and perpendicular to its plane, with a constant angular vel2023 (Memory Based)Angular momentum and Angular impulse
  19. 19A thin circular ring of mass , and radius rotates about an axis through its centre and perpendicular to its plane, with a constant angular v2023 (Morning Shift)Angular momentum and Angular impulse
  20. 20A disc of moment of inertia revolving with is placed on another disc of moment of inertia revolving . The angular frequency of composite dis2022Angular momentum and Angular impulse
  21. 21Four particles each of the mass are placed at the corners of a square of side length . The radius of gyration of the system about an axis pe2020Moment of inertia of rigid bodies
  22. 22The masses of and are attached to the and marks of a light meter rod, respectively. The moment of inertia of the system about an axis passin2020Moment of inertia of rigid bodies
  23. 23A uniform circular disc of mass and radius is rotated about one of its diameter at an angular speed of . The kinetic energy of the disc is2015Rotational kinematics
  24. 24A person sitting firmly over a rotating stool has his arms stretched. If he folds his arms, his angular momentum about the axis of the rotat2015Angular momentum and Angular impulse
  25. 25The diagram shows a barrel of weight on a frictionless slope inclined at to the horizontal. The force is parallel to the slope. What is the 2015Rolling without Slipping
  26. 26A mass of is hung at the mark from a rod weighing pivoted at its centre. The rod will not topple if2012Torque
  27. 27A ring rolls down an inclined plane. The ratio of the rotational kinetic energy to translational kinetic energy is2012Rotational kinematics

Frequently Asked Questions

1.How many questions are available for Rotational Motion?

This chapter includes 27 questions compiled from COMEDK papers spanning 2012 to 2026.

2.Are these questions only from COMEDK, or from other exams too?

These are COMEDK questions specifically for the Rotational Motion chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Rotational Motion an important chapter for COMEDK Physics?

Rotational Motion has appeared in 8 of the 15 years of COMEDK papers covered here, with 27 questions across 16 papers - about 2 per paper it appears in.

4.What is the difficulty level of Rotational Motion questions in COMEDK?

Of the 27 questions analysed for this chapter, 44% are easy, 48% moderate and 7% tough. 2024 had the most, with 7 questions.

5.Which topics in Rotational Motion should I focus on?

These topics have carried the most weightage in Rotational Motion:

  • Torque - 8 questions (30%)
  • Angular momentum and Angular impulse - 7 questions (26%)
  • Rotational kinematics - 5 questions (19%)
  • Rolling without Slipping has produced the most tough questions (1).
6.Is Rotational Motion's weightage in COMEDK going up or down?

Across all 16 papers analysed, Rotational Motion has averaged about 1.7 questions per paper. In the last three years (2024–2026), that average has stayed about the same, at about 1.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.