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Problem Solving

A solid spher...

Question

A solid sphere is released on an inclined plane. If the plane is sufficiently rough for pure rolling, then work done by friction on sphere is

A

Negative

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B

Positive

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C

Zero

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D

Depends upon mass of sphere

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Solution

The correct option is C Zero
Work done by friction is zero in case of pure rolling; because, the point on the rolling body where the friction is being applied has zero speed.

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