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A block is pulled a distance x along a r...

A block is pulled a distance x along a rough horizontal table by a horizontal string. If the tension in the string is T, the weight of the block is W, the reaction is N and frictonal force is F. Write down expressions for the work done by each of these forces.

Text Solution

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`W_(T)=(T) (x) cos 0^@ =Tx`
`W_(W) (x) cos 90^@ =0`
`W(N)=(N)(x) cos 90^@=0`
`W(F)=(F)(x) cos 180^@ =-Fx`.
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