A soft rubber pellet is fired at a target sitting motionless on a frictionless surface. If the pellet has a mass if 50 g, hits the target with a speed of 45 m/s, then bounces back with a speed of 35 m/s, how fast (in m/s) does the target (with a mass of 2 kg) move away? part b: if the soft rubber pellet is replaced with a paintball with the same mass and speed as the rubber pellet, but bursts and sticks to the target instead of bouncing back, how fast ( in m/s) does the target move away? part c:  what mass (in g) paintball would be needed to make the target move away at the same rate as it did with the original rubber pellet?

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