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The work done by a force is given by the...

The work done by a force is given by the dot product of force `vecF` and displacement `vecs`. If the work done is zero, then:

A

`vecF and vecS` act in the same direction

B

`vecF and vecS` act in the opposite direction

C

`vecF and vecS` are parallel to each other

D

`vecF and vecS` are at right angles.

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