A crate resting on a horizontal floor is pulled through a distance of by a constant…

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

Problem

A crate resting on a horizontal floor is pulled through a distance of

5.0\,\text{m}

by a constant force of magnitude

15\,\text{N}

acting at an angle of

37^{\circ}

above the horizontal. The weight of the crate is

120\,\text{N}

and a kinetic frictional force of

10\,\text{N}

opposes the motion. Neglect any vertical displacement of the crate. (i) Calculate the mechanical work done on the crate by the

15\,\text{N}

force. (ii) Determine the work done on the crate by its weight. (iii) Find the net work done on the crate for the entire

5.0\,\text{m}

displacement and state its sign clearly. (iv) Write your final answer for each part with the correct unit.