A 100 g steel ball falls from a height of 1.8m on to a metal plate and rebounds to a height of 1.25 m. Find
a the p. e. of the ball before the fall (g = 10 m/s2).
bits k. e. as it hits the plate,
cits velocity on hitting the plate,
d its k. e. as it leaves the plate on the rebound,
e its velocity of rebound.