a ball with mass 0.16 kg is thrown upward with initial velocity 30 m/s from the roof of a building 20 m high. Neglect air resistance. (A computer algebra system is recommended. Use g = 9.8 m/s2 for the acceleration due to gravity. Round your answers to one decimal place.) (a) Find the maximum height above the ground that the ball reaches. m (b) Assuming that the ball misses the building on the way down, find the time that it hits the ground. S (c) Plot the graph of velocity versus time.