Question

How much work is done in dragging a box of mass. 100 kg on a level floor through a distance of 10 m? $\mu$ between the box and the floor is 0.4 and the force is applied parallel to the floor. $g=9.8m/s^2\left(9320J\right)$

Answer 1

Frictional force acting on it , $=\mu mg=0.4\times 100\times 9.8=392N$

Given , Mass ,$m=100kg$

Distance ,$s=10m$

Work done , $W=\mu mgs=392\times 1=3920J$