A person pushes a box. He applies a force of 400 Newton's, and he pushes the box for a distance of 4 meters. After he stops pushing, the box slides forward another meter. How much work was done by the person?
1,600 joules
2,000 joules
100 joules
400 joules
The work done by a force is calculated by multiplying the force by the distance the force is applied.
Work = Force x Distance
Work = 400 N x 4 m = 1600 joules
So, the person did 1600 joules of work.
Therefore, the correct answer is 1,600 joules.