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A block of mass M is pulled along a hori...

A block of mass M is pulled along a horizontal surface by applying a force at angle `theta` with the horizontal. The friction coefficient between the block and the surfasce is `mu`. If the block travels at a uniform velocity, find the work donen by this applied force during a displacement d of the blcok.

Text Solution

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The situation is shown in ure. In the limiting equilibrium the frictioN/Al force f will be equal to `muN`. For horizontal equilibrium
`F sin theta=muN`
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