A base-ball is thrown from the roof of a building 40.0 meters tall. The initial velocity of the ball is 20 m/s and the angle at which the ball is thrown is 37 degrees over the horizontal.
(i) Determine the speed of the ball just before it hits the ground? Utilize energy methods.
(ii) What would be the answer to part (i) if the initial velocity of ball was at an angle of 37 degrees beneath the horizontal?