Answer to Question #250048 in Physics for Saja

Question

You apply a 71 newton force to a 50 kg box, but it does not move. What is the force of friction acting against your push?

Answer 1

If the box does not move, the forces on them must have compensated each other (according to the first Newton's law). Thus, the friction forces must have the same magnitude as the applied force (but opposite direction).

Answer. 71N in opposite to the applied force direction.