0.40 kg ball is launched at a speed of 16 m/s from a 22 m cliff. (a) What are its kinetic energy, potential energy, and total mechanical energy at the instant it was launched? (Use the base of the cliff for your reference level.) (b) If air resistance is negligible what is the kinetic energy just before it hits the ground? Does this answer depend on the direction the ball was launched? (c) At what speed will the ball be moving just prior to striking the ground if air resistance is negligible?​