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A man is standing on a rail road car tra...

A man is standing on a rail road car travelling with a constant speed of `v = 10 ms^-1` (Fig . 5.34). He wishes to throw a ball through a stationary hoop `5 m` above the height of his hands in such a manner that the ball will move horizontally as it passes through the hoop. He throws the ball with a speed of `12.5 ms^-1` w.r.t. himself.
(a) What must be the vertical component of the initial velocity of the ball ?
(b) How many seconds after he releases the ball will it pass through the hoop ?
( c) At what horizontal distance in front of the loop must he release the ball ?
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