🔄 NEET Physics: Rotational Motion Practice Q&A

Q1

Moment of inertia of a thin circular ring of mass M and radius R about an axis through its centre and perpendicular to its plane is:

Q2

A torque of 20 Nm produces an angular acceleration of 4 rad/s². The moment of inertia is:

Q3

Angular momentum of a rigid body is given by:

Q4

A disc and a ring have same mass and radius. Which has greater moment of inertia about its central axis?

Q5

The radius of gyration of a body about an axis is defined as:

Q6

A solid sphere of mass M and radius R rotates about its diameter. Its moment of inertia is:

Q7

A particle of mass 2 kg moves in a circle of radius 0.5 m with angular speed 10 rad/s. Its angular momentum is:

Q8

A wheel of I = 2 kg m² rotates at 5 rad/s. Torque required to stop it in 10 s is:

Q9

Moment of inertia of a thin rod of length L, mass M about an axis perpendicular to rod through its centre is:

Q10

If the angular velocity doubles, the rotational kinetic energy becomes:

Q11

A solid cylinder and a hollow cylinder have same mass and radius. Which rolls down an incline faster?

Q12

A body rotating at 1200 rpm has angular velocity (rad/s):

Q13

Torque is the rotational analogue of:

Q14

A dancer pulls her arms closer during a spin. What happens to her angular velocity?

Q15

Moment of inertia of a rectangular plate about an axis perpendicular to plate through centre (mass M, sides a,b):

Q16

Angular acceleration is defined as:

Q17

A force of 10 N acts tangentially on a wheel of radius 0.2 m. Torque produced is:

Q18

A thin circular disc of mass M and radius R has moment of inertia about its diameter:

Q19

A ring and a disc roll down an incline. Which reaches bottom first?

Q20

The angular momentum of a system is conserved if:

Q21

A wheel starts from rest and gains angular velocity 20 rad/s in 4 s. Angular acceleration is:

Q22

A body of moment of inertia 3 kg m² rotates with 10 rad/s. Its angular momentum is:

Q23

Rotational kinetic energy of a body is 200 J and angular velocity 10 rad/s. Moment of inertia is:

Q24

A solid sphere rolls without slipping. Ratio of translational KE to rotational KE is:

Q25

Moment of inertia of a thin spherical shell about its diameter:

Q26

A torque of 100 Nm acts on a flywheel of I=20 kg m² for 5 s. Angular impulse is:

Q27

A particle moves in a circle with constant angular speed. Its angular acceleration is:

Q28

Two rings have same mass but radii R and 2R. Ratio of moments of inertia about axis through centre:

Q29

A disc of mass 2 kg and radius 0.5 m. Moment of inertia about perpendicular axis through centre:

Q30

The radius of gyration of a disc about its diameter is:

Q31

A hollow cylinder has same mass and radius as solid cylinder. Their moments of inertia ratio I_hollow/I_solid:

Q32

A rod of length 1 m, mass 3 kg rotates about one end. Moment of inertia is (ML²/3):

Q33

Work done by torque τ when angular displacement is θ:

Q34

Angular velocity of second's hand of a clock is (rad/s):

Q35

A rotating body has I = 5 kg m², ω = 4 rad/s. Its rotational KE is:

Q36

The moment of inertia of a solid sphere about a tangent is:

Q37

A torque of 8 Nm produces angular acceleration 2 rad/s². I = ?

Q38

A particle of mass m moves in circle radius r with speed v. Angular momentum about centre:

Q39

A disc rotating at 10 rad/s is brought to rest in 5 s by constant torque. Angular deceleration:

Q40

A hoop rolls without slipping. Its total KE is:

Q41

A body is in pure rotation. The point where instantaneous velocity is zero:

Q42

If net torque on a body is zero, which quantity is conserved?

Q43

A wheel of radius 0.3 m rolls without slipping. If its angular speed is 20 rad/s, linear speed of centre is:

Q44

Moment of inertia of a solid cylinder about its axis (length L, radius R):

Q45

A rod of length L is bent into a ring. Its moment of inertia about axis perpendicular through centre (mass M):

Q46

A flywheel increases speed from 5 to 10 rad/s in 2 s. Angular acceleration:

Q47

The dimensional formula of moment of inertia is:

Q48

A solid disc and solid sphere have same mass and radius. Which has larger I about central axis?

Q49

A body rolling down an incline with slipping has:

Q50

Angular frequency of a particle in uniform circular motion is related to time period as:

📝 Key Rotational Motion Formulae

📚 Complete Set of 50 Rotational Motion Questions
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