Ce and other 4 A ball has a mass of 0.5 kg. Dropped from a cliff top.
the ball hits the sea below at a speed of 10 m/s
a What is the kinetic energy of the ball as it is about to
b What was the ball's gravitational potential energy
hit the sea?
avitational
ground?
before it was dropped?
c From what height was the ball dropped?
d A stone of mass 1 kg also hits the sea at 10 m/s.
Repeat stages a, b, and c above to find the height from
which the stone was dropped.
publed?
ergy. What