Vo = 10 m /5 1. At time t = 0, a ball is thrown straight up at an initial velocity of 10 m/s, from the top of a building 50 m tall. Neglect air friction. h = 50 cm (a) When will the ball hit the ground? (b) How fast will it be going just before it hits the ground? (c) What was the average velocity of the ball over the entire time it was in the air