A gardener pushes a lawn mower along a level path by applying a constant force of on…

PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

A gardener pushes a lawn mower along a level path by applying a constant force of

250\,\text{N}

on the handle, which is inclined at

30^{\circ}

to the horizontal. The mower moves

20\,\text{m}

along the path. (i) Calculate the work done by the gardener on the mower. (ii) The gardener now wishes to push the mower through the same

20\,\text{m}

but holds the handle at

60^{\circ}

to the horizontal instead. If the same amount of work is to be done, determine the magnitude of the force that must now be applied.