As seen in Fig. 3-15, a force of 400 N pushes on a 25-kg box. Starting from

Question:

As seen in Fig. 3-15, a force of 400 N pushes on a 25-kg box. Starting from rest, the box uniformly speeds up and achieves a velocity of 2.0 m/s in a time of 4.0 s. Compute the coefficient of kinetic friction between box and floor. 306 N 257 N 400 N 50 25 kg FR W F N Fig. 3-15 X