- Amal Augustine
- December 22, 2025
Rotational Motion MCQs: Crucial MCQs That Can Make or Break Your Physics Score
Rotational motion is one of the most scoring yet concept-intensive topics in physics. Rotational motion mcqs questions from this chapter often test how well students understand angular velocity, angular acceleration, angular momentum, and their relationship with linear motion. Rotational motion MCQs on rotational motion frequently combine ideas from circular motion, conservation of angular momentum, rolling motion, and clock-based angular speed problems. Mastering these rotational motion mcqs concepts helps students solve problems quickly and accurately in competitive exams like NEET and JEE.
Rotational motion MCQs often integrate centre of mass concepts to test whether a body undergoes pure rotation or translation along with rotation. Rotational motion mcqs questions rely on understanding how angular velocity remains the same for all particles of a rigid body while linear velocity varies with distance from the axis. Centre of mass plays a key role in analyzing rotating systems under external forces, especially when torque is applied. In rotational motion mcqs problems, conservation of angular momentum is frequently combined with centre of mass motion to predict system behavior accurately.
Rational Motion MCQs with Answers-
1. If a rigid body rotates about a fixed axis, which quantity remains the same for all particles?
A. Linear velocity
B. Linear acceleration
C. Angular velocity
D. Linear momentum
Answer: C
2. The SI unit of angular momentum is
A. kg m² s⁻¹
B. kg m s⁻¹
C. N m
D. J s
Answer: A
3. A body rotating with constant angular velocity has
A. Zero angular acceleration
B. Constant angular acceleration
C. Increasing angular momentum
D. Zero torque
Answer: A
4. Angular displacement is measured in
A. Degrees
B. Radians
C. Revolutions
D. All of these
Answer: D
5. The relation between angular velocity ω and frequency f is
A. ω = f / 2π
B. ω = πf
C. ω = 2πf
D. ω = f²
Answer: C
6. In pure rolling motion, friction
A. Does positive work
B. Does negative work
C. Does no work
D. Always opposes motion
Answer: C
7. Angular acceleration is defined as the rate of change of
A. Angular momentum
B. Angular velocity
C. Torque
D. Moment of inertia
Answer: B
8. Moment of inertia depends on
A. Shape of body
B. Mass distribution
C. Axis of rotation
D. All of these
Answer: D
9. The dimensional formula of torque is
A. ML²T⁻²
B. MLT⁻²
C. ML²T⁻¹
D. MLT⁻¹
Answer: A
10. A couple produces
A. Linear motion only
B. Rotational motion only
C. Both linear and rotational motion
D. No motion
Answer: B
11. Angular momentum is conserved when
A. Net force is zero
B. Net torque is zero
C. Acceleration is zero
D. Velocity is constant
Answer: B
12. The angular velocity of the second hand of a clock is
A. π/30 rad s⁻¹
B. π/60 rad s⁻¹
C. 2π rad s⁻¹
D. π rad s⁻¹
Answer: A
13. A rotating body has maximum kinetic energy when
A. Angular speed is minimum
B. Angular speed is maximum
C. Torque is zero
D. Angular displacement is zero
Answer: B
14. The relation between linear velocity v and angular velocity ω is
A. v = ωr
B. v = ω/r
C. v = r²ω
D. v = ω²r
Answer: A
15. A disc and a ring of same mass and radius roll down an incline. Which reaches first?
A. Disc
B. Ring
C. Both together
D. Depends on height
Answer: A
16. Radius of gyration is defined as
A. Distance where mass is concentrated
B. Distance from axis where entire mass is assumed
C. Distance where torque is zero
D. Distance where velocity is maximum
Answer: B
17. The angular momentum of a body rotating about its own axis is
A. Zero
B. Constant
C. Maximum
D. Depends on torque
Answer: B
18. A flywheel rotating with constant speed has
A. Zero angular momentum
B. Constant angular momentum
C. Increasing kinetic energy
D. Zero moment of inertia
Answer: B
19. Which quantity changes direction continuously in circular motion?
A. Speed
B. Angular velocity
C. Linear velocity
D. Kinetic energy
Answer: C
20. Torque is the rotational equivalent of
A. Momentum
B. Force
C. Energy
D. Power
Answer: B
21. A rotating body in equilibrium must satisfy
A. ΣF = 0
B. Στ = 0
C. Both ΣF = 0 and Στ = 0
D. Angular velocity = 0
Answer: C
22. Moment of inertia of a point mass m at distance r is
A. mr
B. mr²
C. m/r
D. m²r
Answer: B
23. Rolling without slipping implies
A. v = rω
B. v > rω
C. v < rω
D. ω = 0
Answer: A
24. Angular momentum of a particle is given by
A. mv
B. mr
C. r × p
D. r × F
Answer: C
25. Which has the highest moment of inertia for same mass and radius?
A. Solid sphere
B. Solid disc
C. Ring
D. Cylinder
Answer: C
26. A rotating body stops rotating when
A. Force becomes zero
B. Torque becomes zero
C. Angular velocity becomes zero
D. Angular acceleration becomes zero
Answer: C
27. The work done by centripetal force is
A. Maximum
B. Minimum
C. Zero
D. Infinite
Answer: C
28. In uniform circular motion, angular acceleration is
A. Zero
B. Constant
C. Variable
D. Infinite
Answer: A
29. A child sitting on a rotating disc moves towards the center. The angular speed of disc
A. Decreases
B. Increases
C. Remains same
D. Becomes zero
Answer: B
30. Which law explains spinning ice skaters pulling in their arms?
A. Newton’s first law
B. Conservation of linear momentum
C. Conservation of angular momentum
D. Work-energy theorem
Answer: C
Conclusion
Rotational motion MCQs demand a solid grasp of angular velocity, angular acceleration, and angular momentum, along with their connection to linear quantities. Rotational motion mcqs questions cleverly test conservation laws by changing the moment of inertia while keeping angular momentum constant. Understanding how physical quantities behave in rotating systems—such as discs, wheels, clocks, and rolling bodies—helps eliminate confusion and avoid common mistakes. Practicing these rotational motion MCQs strengthens conceptual clarity and builds confidence to tackle high-weightage rotational motion questions in competitive exams.
Rotational Motion MCQs are designed to evaluate both conceptual clarity and problem-solving speed. Rotational motion mcqs questions often blend angular velocity, angular momentum, torque, and centre of mass principles to test deeper understanding rather than rote formulas. Recognizing conserved quantities, interpreting angular graphs, and distinguishing between rotational and translational motion are essential skills. Consistent practice of rotational motion MCQs strengthens intuition and helps students confidently solve high-weightage physics questions in board and entrance examinations.
Amal Augustine is the founder of ExQuizMe, a dynamic learning and quiz platform built to make education engaging, competitive, and fun. A passionate learner and an academic achiever, Amal completed his schooling at Government HSS Manjapra, graduating with 92.5% in Computer Science. He later earned his degree from St. Stephen’s College, University of Delhi, one of India’s most prestigious arts and science institutions.
Currently, Amal is pursuing his Master’s degree at National Sun Yat-sen University, Taiwan, where he continues to deepen his interest in research and technology. Throughout his school and college years, he won 50+ national-level interschool and collegiate quiz competitions, was
Beyond academics, Amal Augustine is an avid reader of science journals, a dedicated research student, and a technology enthusiast who loves programming and exploring the world of Computer Science. Through ExQuizMe, he aims to make learning accessible, enjoyable, and empowering for students across the globe.