A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance of 1 m from the end of the track after falling a vertical distance 1.25 m from the end of the track.
(a) At what height above the ground does the ball start to move?
m
(b) What is the speed of the ball when it leaves the track?
m/s
(c) What is the speed of the ball when it hits the ground?
m/s