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Physics - Rotational Motion

Practise 40 AIIMS previous year questions on Rotational Motion, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Rotational Motion has been asked in 18 of the 19 years of AIIMS papers analysed (2001–2019), with 40 questions in all. 40% of them were easy, 43% moderate and 18% tough. Most of its questions came from 2019, with 6 questions that year. In the last three years (2017–2019) it had 10 questions across 5 papers, about 2 per paper.

The chapter's 6 topics are not weighted equally: Angular momentum and Angular impulse (13 questions, 33%), Moment of inertia of rigid bodies (13 questions, 33%), and Torque (5 questions, 13%) have been asked the most. Rotational kinematics has produced the most tough questions (3).

  1. 1Given , Find the angular momentum of ring about its origin if it is in pure rolling.26 May, 2019Angular momentum and Angular impulse
  2. 2The radius of gyration of a thin uniform circular disc (of radius ) about an axis passing through its centre and lying in its plane is26 May, 2019Moment of inertia of rigid bodies
  3. 3Assertion : For a system of particles under central force field, the total angular momentum is conserved. Reason : The torque acting on such26 May, 2019Angular momentum and Angular impulse
  4. 4A thin wire of mass and length is bent to form a circular ring. The moment of inertia of this ring about its axis is25 May, 2019Moment of inertia of rigid bodies
  5. 5A disc of radius and mass is rolling on an inclined plane. Find out the frictional force such that disc performs pure rolling.25 May, 2019Rolling without Slipping
  6. 6Assertion : A person standing on a rotating platform suddenly stretched his arms. The platform slows down. Reason : This happens as angular 25 May, 2019Angular momentum and Angular impulse
  7. 7An elevator starts going up with an acceleration . If radius of the wheel attached to the elevator is , then find out number of revolutions 27 May, 2018Rotational kinematics
  8. 8Assertion : Torque on a body can be zero event if there is a net forces on it. Reason : Torque and force on a body are always perpendicular.26 May, 2018Torque
  9. 9A communication satellite of revolves around the earth in a circular orbit of radius in the equatorial plane of the earth from west to east.2017Angular momentum and Angular impulse
  10. 10Assertion : A solid sphere is rolling on a rough horizontal surface. Acceleration of contact point is zero. Reason : A solid sphere can roll2017Rolling without Slipping
  11. 11A sphere of mass and radius rotates about a tangent. The moment of inertia of the sphere is2016Moment of inertia of rigid bodies
  12. 12Assertion : Value of radius of gyration of a body depends on axis of rotation. Reason : Radius of gyration is root mean square distance of p2016Moment of inertia of rigid bodies
  13. 13An air compressor is powered by a electric motor using a V-belt drive. The motor pulley is in radius, and the tension in the -belt is on one2015Torque
  14. 14Assertion : A judo fighter in order to throw his opponent on to the mat tries to initially bend his opponent and then rotate him around his 2015Torque
  15. 15A particle moves in a circular path with decreasing speed. Choose the correct statement.2014Angular momentum and Angular impulse
  16. 16A child is standing with folded hands at the centre of a platform rotating about its central axis. The kinetic energy of the system is . The2014Angular momentum and Angular impulse
  17. 17Assertion: The velocity of a body at the bottom of an inclined plane of given height is more when it slides down the plane compared to when 2014Combination of translation and rotation
  18. 18Given that force acts on a particle at position . Find torque of this force on the particle about origin.2013Torque
  19. 19Assertion : Moment of inertia is always constant. Reason : Angular moment is conserved that is why moment of inertia is constant.2013Moment of inertia of rigid bodies
  20. 20A roller is attached to a massless spring of spring constant . It rolls without slipping along a frictionless horizontal road. The roller is2012Rolling without Slipping
  21. 21If mass is rotating on a circular path of radius with angular velocity of . If radius of the path becomes , then what will be the value of a2012Angular momentum and Angular impulse
  22. 22A solid cylinder, a circular disc, a solid sphere and a hollow cylinder of the same radius are placed on an inclined plane. Which of the fol2012Moment of inertia of rigid bodies
  23. 23What is the moment of inertia for a solid sphere w.r.t. a tangent touching to its surface?2011Moment of inertia of rigid bodies
  24. 24What is moment of inertia of a cylinder of radius , along its height ?2010Moment of inertia of rigid bodies
  25. 25Four holes of radius are cut from a thin square plate of side and mass . The moment of inertia of the remaining portion about -axis is2010Moment of inertia of rigid bodies
  26. 26Assertion : A wheel moving down a perfectly frictionless inclined plane will undergo slipping (not rolling motion) Reason : For perfect roll2010Rolling without Slipping
  27. 27Assertion : A hollow shaft is found to be stronger than a solid shaft made of same material. Reason : The torque required to produce a given2010Torque
  28. 28Assertion : Angular speed of a planet around the sun increases, when it is closer to the sun. Reason : Total angular momentum of the system 2009Angular momentum and Angular impulse
  29. 29Side of an equilateral triangle is \(l\). Three point masses, each of magnitude \(m\), are placed at the three vertices of the triangle. Mom2008Moment of inertia of rigid bodies
  30. 30If a solid sphere of mass \(1 {~kg}\) and radius \(0.1 {~m}\) rolls without slipping at a uniform velocity of \(1 {~m} / {s}\) along a strai2007Rotational kinematics
  31. 31In the diagram shown below all three rods are of equal length \(L\) and equal mass \(M\). The system is rotated such that \( {rod} B\) is th2007Moment of inertia of rigid bodies
  32. 32The moment of inertia of a rod about an axis through its centre and perpendicular to it is (where is the mass and , the length of the rod). 2006Moment of inertia of rigid bodies
  33. 33Assertion : A judo fighter in order to throw his opponent on to the mat tries to initially bend his opponent and then rotate him around his 2006Moment of inertia of rigid bodies
  34. 34A solid sphere is rolling on a frictionless surface, shown in figure with a translational velocity . If it is to climb the inclined surface 2005Rotational kinematics
  35. 35A horizontal platform is rotating with uniform angular velocity around the vertical axis passing through its centre. At some instant of time2005Angular momentum and Angular impulse
  36. 36Assertion : For a system of particles under central force field, the total angular momentum is conserved. Reason : The torque acting on such2005Angular momentum and Angular impulse
  37. 37In an orbital motion, the angular momentum vector is2004Angular momentum and Angular impulse
  38. 38The angular momentum of a moving body remains constant if2002Angular momentum and Angular impulse
  39. 39Two masses are attached to a rod end to end. If torque is applied they rotate with angular acceleration . If their distances are doubled and2001Rotational kinematics
  40. 40If the earth is treated as a sphere of radius and mass , its angular momentum about the axis of its rotation with period , is2001Angular momentum and Angular impulse

Frequently Asked Questions

1.How many questions are available for Rotational Motion?

This chapter includes 40 questions compiled from AIIMS papers spanning 2001 to 2019.

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

These are AIIMS questions specifically for the Rotational Motion chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

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

Rotational Motion has appeared in 18 of the 19 years of AIIMS papers covered here, with 40 questions across 20 papers - about 2 per paper it appears in.

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

Of the 40 questions analysed for this chapter, 40% are easy, 43% moderate and 18% tough. 2019 had the most, with 6 questions.

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

These topics have carried the most weightage in Rotational Motion:

  • Angular momentum and Angular impulse - 13 questions (33%)
  • Moment of inertia of rigid bodies - 13 questions (33%)
  • Torque - 5 questions (13%)
  • Rotational kinematics has produced the most tough questions (3).
6.Is Rotational Motion's weightage in AIIMS going up or down?

Across all 20 papers analysed, Rotational Motion has averaged about 2.0 questions per paper. In the last three years (2017–2019), that average has stayed about the same, at about 2.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.