A box is pulled with a force of 25 N to produce a displacement of 15 m. If the angle between the force and displacement is `30^(@)`. Find the work done by the force ?

Explanation

Force , F = 25N
Displacement , dr = 15 m
angle between F and `dr, theta = 30^@`
Work done , W = F ` dr cos theta`
` W = = 25 xx 15 xx cos 30 = 25 xx 15 xx (sqrt3)/(2)`
` = W = 324.76 J`