10th Edition

ISBN: 9781119164333

Author: Halliday

Publisher: WILEY

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Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.

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Textbook Question

Chapter 7, Problem 72P

In Fig. 7-49a, a 2.0 N force is applied to a 4.0 kg block at a downward angle θ as the block moves rightward through 1.0 m across a frictionless floor. Find an expression for the speed v_ƒ of the block at the end of that distance if the block’s initial velocity is(a) 0 and (b) 1.0 m/s to the right. (c) The situation in Fig. 7-49b is similar in that the block is initially moving at 1.0 m/s to the right, but now the 2.0 N force is directed downward to the left. Find an expression for the speed v_ƒ of the block at the end of the 1.0 m distance. (d) Graph all three expressions for v_f versus downward angle θ for θ = 0° to θ = 90°. Interpret the graphs.

Chapter 7, Problem 72P, In Fig. 7-49a, a 2.0 N force is applied to a 4.0 kg block at a downward angle as the block moves

Figure 7-49 Problem 72.

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Chapter 7, Problem 71P

Chapter 7, Problem 73P

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Chapter 7 Solutions

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