Question

of work is done in sliding a block up an inclined plane of height . The work done against friction is (Take )

A

zero

B

C

D

Medium
Solution
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Correct option is B)



                               


Let be the work done against friction
The total work done on a particle is equal to the change in its mechanical energy


   


From equation (1)

Substituting the  values :


Hence option is correct.

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