JEE · NEET Previous Year Question
A solid homogenous sphere of mass and radius is moving on a rough horizontal surface, partly rolling and partly sliding. During this kind of motion of this sphere
Topic: NEET PYQ
Answer: B. Full step-by-step solution below.
- Atotal kinetic energy is conserved
- Bthe angular momentum of the sphere about the point of contact with the plane is conserved
- Conly the rotational kinetic energy about the centre of mass is conserved
- Dangular momentum about the centre of mass is conserved
Correct answer: B
Solution
(b) : Angular momentum about the point of contact with the surface includes the angular momentum about the centre. Because of friction, linear momentum will not be conserved.More Rotational Mechanics PYQs
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