1. A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 3.00 m higher than A, with speed v. Calculate (a) the speed v, (b) the maximum height reached by the stone above point B. At the instant when the first ball is at point B, second ball is thrown upward with two-thirds the initial velocity from the ground. (c) How long after the second ball is thrown does it take if the two balls are to meet at the point A. (d) What is the height of the point A above the ground if the two balls are to meet at the point A.