JEE Main Physics question

A drum of radius and mass rolls down without slipping along an inclined plane of angle . The frictional force

(A)Converts translational energy to rotational energyCorrect
(B)Dissipates energy as heat
(C)Decreases the rotational motion
(D)Decreases the rotational and translational motions

Answer: (A)

Solution

For rolling without slipping on a surface, static friction does no work (no relative sliding at the contact point), so it dissipates no energy as heat; instead, it

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Question ID VK-158581