A ball is thrown vertically upward with an initial speed of 15 m/s from 80 m above the ground. Assume free fall conditions. (a) What is the max height? (b) Determine the magnitude of the velocity at 40 m above ground. (c) At what speed does the ball strike the ground? A 2 kg ball is dropped from 25 m up. How fast is it going 5 meter above the ground given that there is no air friction?