A 0.50 kg basketball is bounced straight down against the floor. It hits the floor with a speed of 9.0 m/s and bounces back vertically at a speed of 7.2 m/s. (a) What is the coefficient of restitution in this collision? (b) What is the change in kinetic energy of the ball? (c) What is the change in momentum of the ball? (d) Would this collision be categorized as totally inelastic, inelastic, or (totally) elastic? Explain.

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