(a) What is the impulse needed to stop a 20 kg bowling ball moving at 5 m/s?
(b) A 2000 kg car accidentally drops from a crane and crashes at 30 m/s to the ground below and comes to an abrupt halt. What is the momentum at impact?
(c) A railroad diesel engine weighs two times as much as a freight car. If the diesel engine coasts at 5 km/hr into a freight car that is initially at rest, how fast do the two coasts after they couple together?
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