A force of 18.18 N is used to push a box with a weight of 31.1 N up a ramp that is 3.40 m long and 1.69 m high. After being pushed up the ramp, it sits motionless at the top.
(a) How much work is done on the box?
(b) What is the potential energy of the box at the top of the ramp?
(c) How much energy is lost to friction as it moves up the ramp?