What is the condition for a force to do work on a body?

As we know the expression for work done $W=F\times d\cos\theta$

Here, $W\rightarrow$ work done

$F\rightarrow$Applied force

$d\rightarrow$displacement in the body

$\theta\rightarrow$angle between the directions of applied force and the displacement in the body.

If $\theta=90^o$

Then, the work done $W=f\times d\times 0=0$  [$\cos\theta=\cos90^o=0$]

So, for the work done there must be a force acting on the body which can cause displacement in the body. And the directions of the acted force should not be perpendicular to the direction of the displacement.

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Updated on: 10-Oct-2022

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