A 8.0 kg box is released from rest on a frictionless ramp. The box slides from the ramp onto a rough horizontal surface with a friction mk =0.50. The starts at a height of 4 meters (yo = 4 m). What is the formula for force friction?

What is the formula for work (W)?

What type of energy does the box have at the begging on this problem?

Where does the energy go after the box come to rest?

What distance d will the box slide?