A box of mass 44kg is pushed hard enough to set it in motion across a flat surface. The coefficient of kinetic friction between the box and the surface is .48.

Question

The rest of the question is What minimum pushing force is needed to keep the box moving at a constant velocity?

Answer 1

For the box to move at a constant velocity, the applied force must cancel the force due to kinetic friction.

 

F = mu_k * N

 

N = normal force = weight (= mg) if sliding horizontally

 

F = mu_k * mg = (0.48)(44 kg)(9.8 m/s^2) = 207 N