A massive box is dragged along a horizontal floor by a rope. The rope makes an angle of `60^(@)` with the horizontal. Find the work done if the tension in the rope is 200 N and the box is moved through a distance of 20 m.

Explanation

Tension T = 200 N , distance S = 20 m, `theta = 60^(@)`
Work done `W = vec(F).vec(S)=FS cos theta = (F cos theta)s`
`= 200xx cos 60^(@)xx20=2000 J`