Answer to Question #181640 in Physics for Caitlin

Question

1. How much force is required to keep a 780 N box moving at constant velocity across the floor if the friction force between the box and the floor is 160 N?

Answer 1

In order to keep the box moving with the constant velocity (zero acceleration), there should be no total force acting on it. Thus, in order to compensate 160N friction force we should apply the same force in opposite direction.

Answrer. 160N.