A 75 kg fisherman in a 135 kg boat throws a pile of 0.80 kg rocks towards the shore. If he throws each rock with a speed of 15 m/s causing the boat to move, how many rocks must he throw per minute to maintain a constant average speed against a 5.0 N force of resistance?

A 75 kg fisherman in a 135 kg boat throws a pile of 0.80 kg rocks towards the shore. If he throws each rock with a speed of 15 m/s causing the boat to move, how many rocks must he throw per minute to maintain a constant average speed against a 5.0 N force of resistance?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter5: Displacement And Force In Two Dimensions

Section: Chapter Questions

Problem 8STP

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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?”

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