System of Particles and Rotational Motion - Result Question 79
85. A drum of radius $R$ and mass $M$, rolls down without slipping along an inclined plane of angle $\theta$. The frictional force
[2005]
(a) dissipates energy as heat
(b) decreases the rotational motion
(c) decreases the rotational and translational motion
(d) converts translational energy to rotational energy
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Answer:
Correct Answer: 85. (d)
Solution:
- (d) Net work done by frictional force when drum rolls down without slipping is zero.
$ W _{\text{net }}=0 $
i.e., converts translation energy to rotational energy.
