7th Edition

ISBN: 9780321625922

Author: Douglas C. Giancoli

Publisher: Addison-Wesley

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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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Textbook Question

Chapter 4, Problem 91GP

A 72-kg water skier is being accelerated by a ski boat on a flat (“glassy") lake. The coefficient of kinetic friction between the skier's skis and the water surface is μ k = 0.25 (Fig. 4-74). (a) What is the skier’s acceleration if the rope pulling the skier behind the boat applies a horizontal tension force of magnitude F_T= 240 N to the skier ( θ = 0°)? (b) What is the skier's horizontal acceleration if the rope pulling the skier exerts a force of F_t= 240 N on the skier at an upward angle θ =12°? (c) Explain why the skier's acceleration in part (b) is greater than that in part (a)

Chapter 4, Problem 91GP, A 72-kg water skier is being accelerated by a ski boat on a flat (“glassy") lake. The coefficient of Figure 4-74

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Chapter 4, Problem 90GP

Chapter 4, Problem 92GP

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