posted by Anonymous .
A ball is thrown horizontally off the edge of a cliff with an initial speed of 20.4 m/s.
(a) How long does it take for the ball to fall to the ground 20.3 m below?
(b) How long would it take for the ball to reach the ground if it were dropped from rest off the cliff edge?
(c) How long would it take the ball to fall to the ground if it were thrown at an initial velocity of 20.4 m/s but 12° below the horizontal?