Question

work is done when
the displacement is not zero.
the force and displacement are perpendicular
the displacement is zero.
the force is zero.

Explanation:

Work is calculated using the formula \(W = F\times d\times\cos\theta\), where \(F\) is force, \(d\) is displacement, and \(\theta\) is the angle between force and displacement. If displacement \(d = 0\), then \(W=0\). If \(F = 0\), then \(W = 0\). If \(\theta = 90^{\circ}\), \(\cos\theta=0\) and \(W = 0\). Only when displacement is non - zero (and force is non - zero and \(\cos\theta
eq0\)) work is done.

Answer:

the displacement is not zero.