A box, with a weight of mg = 25 N, is placed at the top of a
ramp and released from rest. The ramp measures 4.20 meters
horizontally and 3.30 meters vertically. The box accelerates down
the incline, attaining a kinetic energy at the bottom of the ramp
of 54.0 J. There is a force of kinetic friction acting on the box
as it slides down the incline. What is the coefficient of kinetic
friction between the box and ramp?