A person pushes a box. He applies a force of 400 Newtons and he pushes the box for a distance of 4 meters after he stops pushing the box slides foward another meter how much work was done by the person
The work done by the person can be calculated by multiplying the force applied by the distance over which the force is applied:
Work = Force x Distance
Work = 400 N x 4 m
Work = 1600 Joules
Since the box slides forward after the person stops pushing, an additional work is done by the frictional force during the sliding motion. The work done by the frictional force can be calculated using the same formula:
Work = Force x Distance
Work = Frictional force x Distance
Work = 400 N x 1 m
Work = 400 Joules
Therefore, the total work done by the person is 2000 Joules.