7 1 point A tennis player places a 62 kg ball machine on a frictionless surface, as shown below. The machine fires a 0.031 kg tennis ball horizontally with a velocity of 35.1m/s toward the north. What is the final velocity of the machine? 1712 Type your answer.. 8 1 point Two carts, A with masses of 9.57 kg and B has a mass 3.94 kg move toward each other on a frictionless track with speeds of 6.32 m/s and 3.70 m/s respectively. The carts stick together after colliding head-on. Find the final speed. Type your