Block a slides down a ramp whose slope is 45°. an identical block b slides down a ramp whose slope is 60°. both blocks start at a height of 2 meters. compare the kinetic energies (ke) of the blocks just before they reach the bottom, assuming there is no friction.
a) they are the same
b) block a's pe is greater than block b's pe
c) block b's pe is greater than block a's pe
d) the actual masses must be known in order to figure this out