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A 2.50 kg ball moving at 7.50 m/s is caught by a 70.0 kg man while the man is standing on ice. How fast will the man/ ball combination be moving after the ball is caught by the man?

Respuesta :

Momentum p = mv is conserved.

before: p = 2.5 * 7.5 + 70 * 0 
after: p = (2.5 + 70) * v

p before = p after

2.5 * 7.5 = (2.5 + 70) * v
v = 2.5 * 7.0 / (2.5 + 70)
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