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Find the coefficient of kinetic friction between a 3.85-kg

Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker ISBN: 9780321541635 54

Solution for problem 71GP Chapter 6

Physics with MasteringPhysics | 4th Edition

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Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker

Physics with MasteringPhysics | 4th Edition

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Problem 71GP

Find the coefficient of kinetic friction between a 3.85-kg block and the horizontal surface on which it rests if an 850-N/m spring must be stretched by 6.20 cm to pull it with constant speed. Assume that the spring pulls in the horizontal direction.

Step-by-Step Solution:

Solution 71GP

Step 1 of 3</p>

Here we have to calculate the coefficient of kinetic friction between the given block and the horizontal surface on which it is at rest.

In the given case, a block of lies on a horizontal plane with kinetic friction . If a spring with spring constant is stretched to a length to pull the block with constant speed by assuming all the pulls are in horizontal direction.

Step 2 of 3</p>

Here let us consider the motion of the block is along x-axis which is horizontal direction.

Since the block moves with constant speed, the acceleration of the block will be zero (a=0). Therefore, the net force acting on the block will be zero.

Considering the horizontal components acting on the block, we can write

                                                

Using  and  where N is the normal force on block, we get

                                                

Solving for ,

                                                

Also normal force is given by considering vertical components , that is

                                                

Step 3 of 3

Chapter 6, Problem 71GP is Solved
Textbook: Physics with MasteringPhysics
Edition: 4
Author: James S. Walker
ISBN: 9780321541635

This textbook survival guide was created for the textbook: Physics with MasteringPhysics, edition: 4. The answer to “Find the coefficient of kinetic friction between a 3.85-kg block and the horizontal surface on which it rests if an 850-N/m spring must be stretched by 6.20 cm to pull it with constant speed. Assume that the spring pulls in the horizontal direction.” is broken down into a number of easy to follow steps, and 43 words. This full solution covers the following key subjects: horizontal, spring, kinetic, constant, direction. This expansive textbook survival guide covers 32 chapters, and 3833 solutions. Since the solution to 71GP from 6 chapter was answered, more than 525 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 71GP from chapter: 6 was answered by , our top Physics solution expert on 07/27/17, 10:59AM. Physics with MasteringPhysics was written by and is associated to the ISBN: 9780321541635.

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