Work done

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(C) Work done by a constant force is given by the formula:$W = F s \cos 	heta$where $F$ is the applied force,$s$ is the displacement,and $	heta$ is

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can either be positive or negative

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(C) Work done by a constant force is given by the formula:$W = F s \cos 	heta$where $F$ is the applied force,$s$ is the displacement,and $	heta$ is the angle between the direction of force and displacement.If $	heta = 0^{\circ}$,then $W = F s \cos 0^{\circ} = F s$ (positive).If $	heta = 90^{\circ}$,then $W = F s \cos 90^{\circ} = 0$ (zero).If $	heta = 180^{\circ}$,then $W = F s \cos 180^{\circ} = -F s$ (negative).Therefore,work done can be positive,negative,or zero.

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