Question

A gradener pushes a lawn roller through a distance 20 m. If he applies a force of 20 kg-wt in a direction inclined at `60^(@)` to the ground, the work done by him is
A. 1960 J
B. 196 J
C. 1.96 J
D. 196 kJ

Answer 1

Correct Answer - A
Given, `F=20 kg-wt=20xx9.8N` and `s=20 m`
`:.` Work done `="F s" cos theta`
`=20xx9.8xx20xx cos 60^(@)=1960 J`