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A force of $7\ N$ acts on an object. The displacement is, say $8\ m$, in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work done in this case ?
As given, displacement of the object $d=8\ m$
Force acted on the object $F=7\ N$
Now, Work done$=Force\times Displacement$
$=7\times8=56\ J$
Thus, the work done is $56\ J$.
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