Work done by friction in case of pure rolling

Work done by friction in case of pure rolling

  1. A

    is always zero .

  2. B

    is always positive

  3. C

    is always negative

  4. D

    may be positive, negative or zero

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    Solution:

    Work done by friction in pure rolling is always zero. It is because there is no displacement by frictional force. Friction works only in case of rolling with sliding.

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