A person pushes a box. He applies a force of 400 newtons, and he pushes the box fora distance of 4 meters. After he stops pushing, the box slides toward another meter. How much work was done by the person.
Work is defined as the force applied multiplied by the distance over which it is applied. In this case, the force applied is 400 newtons, and the distance over which it is applied is 4 meters. Therefore, the work done by the person is:
Work = Force * Distance
= 400 newtons * 4 meters
= 1600 joules
So, the person has done 1600 joules of work.