A 0.160 kg croquet ball makes an elastic head-on collision with a second ball in

Question

A 0.160 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. What is the mass of the second ball? kg What fraction of the original kinetic energy (Delta KE/KE) gets transferred to the second ball? A 62.7-kg basketball player jumps vertically and leaves the floor with a velocity of 1.65 m/s upward. (Take upward as positive and forward as positive.) What impulse does the player experience? magnitude N s direction (b)

Explanation / Answer

4) a)Impulse=change in momentum=62.7*1.65-0=103.45Ns diection upwards. b)before the jump,the floor applies normal reaction=mg=62.7*9.8N=614.46N c)impulse=force*time force=103.45/0.45=229.8N 3)

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