A 5 - -oz baseball traveling at 80 mph rebounds off a bat with a speed of 156 mph. The ball is in contact with the bat for roughly 10-3 s. The incoming velocity of the ball is horizontal, and the outgoing trajectory forms an angle a = 31 with respect to the incoming trajectory. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the percent change of the angle a (with respect to 31) if we were to neglect the effects of the force of gravity on the ball. (Round the final answer to six decimal places.) The angle a would increase by | %. Consider a pulley system in which bodies A and B have masses m = 2 kg and mB = 9 kg. The system is released from rest. Neglect all sources of friction, as well as the inertia of the pulleys. B A Determine the speeds of A and B after B has displaced a distance of 0.6 m downward. The speed of A is m/s. The speed of B is m/s.