- Amal Augustine
- December 24, 2025
Rolling Motion and Rotational Dynamics MCQs: Master Concepts with Confidence
Understanding rolling motion and rotational dynamics mcqs is essential for mastering higher-level physics, especially for Class 11 & 12, JEE, NEET, and CUET aspirants. These rolling motion and rotational dynamics mcqs topics connect linear motion with rotational motion and explain how energy, friction, torque, and moment of inertia work together in real-world systems like wheels, cylinders, spheres, and flywheels.
Rolling motion and rotational dynamics mcqs are among the most conceptually rich topics in classical mechanics. They explain how objects such as wheels, spheres, cylinders, and discs move when both translation and rotation occur simultaneously. Rolling motion and rotational dynamics mcqs concepts like moment of inertia, rotational kinetic energy, torque, angular velocity, friction, and energy conservation play a vital role in understanding real-world motion.
Practicing Rolling Motion and Rotational Dynamics MCQs helps students strengthen conceptual clarity, avoid common mistakes, and improve numerical problem-solving speed. The following questions are on the topic of rolling motion and rotational dynamics mcqs which are a carefully curated set of 21 mcqs with options and answers that covers rolling without slipping, rotational kinetic energy, friction direction, radius of gyration, and conservation principles.
Rolling Motion and Rotational Dynamics MCQs
1. A solid sphere rolls down two inclined planes of the same height but different inclinations.
A. Speed and time are same
B. Speed same, time different
C. Speed different, time same
D. Speed and time both different
Answer: B
2. A beaker placed at distance R on a rotating disc will rotate with it if
A. R ≥ g / (2ω²)
B. R ≤ g / (2ω²)
C. R = g / ω²
D. R ≥ g / ω
Answer: B
3. When no external torque acts on a rotating system
A. Angular momentum is not conserved
B. Rotational kinetic energy is conserved
C. Rotational KE ∝ 1/I
D. Rotational KE ∝ I
Answer: B
4. To obtain maximum moment of inertia using equal masses of aluminium and iron, the disc should be prepared such that
A. Aluminium inside, iron outside
B. Iron inside, aluminium outside
C. Alternate layers
D. One disc over another
Answer: A
5. If Earth stops rotating about its axis, change in weight will occur at
A. Equator
B. 60° latitude
C. Poles
D. Nowhere
Answer: D
6. A wheel of mass 10 kg and radius of gyration 0.5 m rotating at 300 rpm has rotational KE
A. 625 J
B. 1000 J
C. 1250 J
D. 1500 J
Answer: C
7. If I is moment of inertia and L angular momentum, then L² / 2I represents
A. Translational kinetic energy
B. Rotational kinetic energy
C. Linear momentum
D. Torque
Answer: B
8. No work is done in uniform circular motion because
A. No force acts
B. No displacement occurs
C. Force is radial
D. Force is perpendicular to displacement
Answer: D
9. A wheel (I = 2 kg·m²) rotating at 25 rad/s comes to rest in 10 min. Work done by friction is
A. 25 J
B. 625 J
C. 50 J
D. 600 J
Answer: B
10. When a ball bounces off the ground (no energy loss), which quantity changes suddenly?
A. Speed
B. Momentum
C. Kinetic energy
D. Potential energy
Answer: B
11. A couple produces
A. Pure linear motion
B. Pure rotational motion
C. No motion
D. Linear and rotational motion
Answer: B
12. Motion of a fan rotating about its axis is
A. Rolling
B. Skidding
C. Rolling with slipping
D. Pure rotation
Answer: D
13. Kinetic energy of a rotating ring is
A. mrω
B. ½mr²
C. mr²ω
D. ½mr²ω²
Answer: D
14. A flywheel has KE = 360 J at ω = 30 rad/s. Moment of inertia is
A. 0.6 kg·m²
B. 0.15 kg·m²
C. 0.8 kg·m²
D. 0.75 kg·m²
Answer: C
15. Direction of friction on a cylinder rolling up and down an incline is
A. Down both times
B. Up both times
C. Up while ascending, down while descending
D. Down while ascending, up while descending
Answer: B
16. If rotational KE is 40% of translational KE, the rolling body is
A. Ring
B. Hollow cylinder
C. Solid disc
D. Solid sphere
Answer: D
17. Two rolling spheres of different masses reach the bottom together because
A. Same friction
B. Same radius
C. Acceleration independent of mass
D. Same energy
Answer: C
18. Solid sphere and disc reach at different times due to
A. Different radius of gyration
B. Different friction
C. Different mass
D. Different size
Answer: A
19. While rolling down an incline, potential energy converts into
A. Translational KE only
B. Rotational KE only
C. Translational + rotational KE
D. Heat only
Answer: C
20. At any instant, a rolling body can be considered to rotate about
A. Its centre of mass
B. The topmost point
C. The point of contact with ground
D. The geometric centre
Answer: C
21. For pure rolling motion, which condition must be satisfied?
A. v = rω
B. v > rω
C. v < rω
D. v = 0
Answer: A
Conclusion
Mastering Rolling Motion and Rotational Dynamics MCQs is crucial for developing a strong foundation in mechanics. These questions are on rolling motion and rotational dynamics mcqs that highlight how moment of inertia, friction, torque, and energy conversion govern the motion of rolling bodies. Regular practice of such rolling motion and rotational dynamics MCQs improves conceptual clarity, numerical accuracy, and exam confidence. Whether preparing for board exams or competitive entrance tests, understanding these principles ensures a deeper grasp of real-world rotational systems.
Understanding rolling motion and rotational dynamics mcqs helps students connect abstract physics formulas with real-world motion. These rolling motion and rotational dynamics MCQs on rotational inertia, rolling without slipping, friction, and rotational kinetic energy reinforce how mass distribution and shape influence motion. By practicing such questions, learners strengthen their conceptual clarity and problem-solving speed, which is crucial for exams like JEE, NEET, and other competitive tests. Overall, mastering these rolling motion and rotational dynamics mcqs concepts builds a solid foundation for advanced mechanics and deepens appreciation of how rotational motion governs everyday physical systems.
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.