A swimmer with a mass of 75 kg dives off a raft with a mass of 500 kg. If the swimmer's speed is 4 m/s immediately after leaving the raft, what is the speed of the raft? (A) 0.2 m/s B 0.4 m/s 0.6 m/s D 0.8 m/s (E) 1m/s

A swimmer with a mass of 75 kg dives off a raft with a mass of 500 kg. If the swimmer's speed is 4 m/s immediately after leaving the raft, what is the speed of the raft? (A) 0.2 m/s B 0.4 m/s 0.6 m/s D 0.8 m/s (E) 1m/s

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter9: Momentum And Its Conservation

Section9.2: Conservation Of Momentum

Problem 23PP

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

Question

A swimmer with a mass of 75 kg dives off a raft with a mass of 500 kg. If
the swimmer's speed is 4 m/s immediately after leaving the raft, what is
the speed of the raft?
(A) 0.2 m/s
B 0.4 m/s
0.6 m/s
D 0.8 m/s
(E) 1m/s

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