Question

a 1300 newton crate slides 14 meters down a ramp that makes an angle of 30 degree with the horizontal. if the crate slides at a constant speed, how much thermal energy is created?

Answer 1

All of the potential energy lost is converted to heat, since the kinetic energy does not change.

The potential energy loss is
(Weight)x(Change in Height)
= 1300 N * 14 m sin 30 = __?_ Joules