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A ball falls from height of 20.0 m, hits the floor, and rebounds vertically upward to...

A ball falls from height of 20.0 m, hits the floor, and rebounds vertically upward to height of 15.5 m. Assume that mball = 0.335 kg.

(a) What is the impulse (in kg · m/s) delivered to the ball by the floor?

b) If the ball is in contact with the floor for 0.0400 seconds, what is the average force (in N) the floor exerts on the ball?

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