Impulse: A 0.140-kg baseball is dropped from rest. It has a speed of 1.20 m/s just before it hits the ground, and it rebounds with an upward speed of 1.00 m/s. The ball is in contact with the ground for 0.0140 s. What is the average force exerted by the ground on the ball during the time of contact?
A. 2.00 N upwards
B. 2.00 N downwards
C. 22.0 N upwards
D. 22.0 N downwards
E. 0.00 N
Answer: C
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