Question

For work done to be maximum, the angle between the force and displacement should be ______.

Options

• \[0^\circ\]

• \[30^\circ\]

• \[45^\circ\]

• \[90^\circ\]

Answer 1

For work done to be maximum, the angle between the force and displacement should be 0°.

Explanation:

Work done is \[W = FS\cos\theta\]. The value of \[\cos\theta\] is maximum (= 1) at \[\theta = 0^\circ\], giving \[W_{\max} = FS\]. At \[30^\circ\], \[45^\circ\] and \[90^\circ\], \[\cos\theta\] is less than 1 or zero, so the work is not maximum.