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Get Full Access to University Physics - 13 Edition - Chapter 5 - Problem 27e
Get Full Access to University Physics - 13 Edition - Chapter 5 - Problem 27e

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# A stockroom worker pushes a box with mass 11.2 kg on a

ISBN: 9780321675460 31

## Solution for problem 27E Chapter 5

University Physics | 13th Edition

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University Physics | 13th Edition

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Problem 27E

A stockroom worker pushes a box with mass 11.2 kg on a horizontal surface with a constant speed of 3.50 m/s. The coefficient of kinetic friction between the box and the surface is 0.20. (a) What horizontal force must the worker apply to maintain the motion? (b) If the force calculated in part (a) is removed, how far does the box slide before coming to rest?

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Solution 27E Mass of the box is 11.2 kg. The weight or the normal reaction it will get is, Normal force = N = mg = 11.2 × 9.8 = 109.76 N The kinetic friction coefficient is,K = 0.20. The frictional force is, F = NK= 0.20 × 109.76 = 21.952 N . a)The horizontal force is 21.952 N. b)The box was left after some time. So the initial velocity was 3.50 m/s and the acceleration will be 1.96 m/s . The kinetic energy of the box when it was moving with the velocity of 3.50 m/s was, 2 2 K.E = 1/2 mv = 1/2 × 11.2 × 3.50 = 68.6 jules. The work done by the frictional force to stop the block is, W = force × distance = 21.952 × x But as we know that , the kinetic energy at the end would be zero, so, W = K.E = 68.6 jules 21.952 × x = 68.6 jules x = 68.6 / 21.952 = 3.125 meters. So, before stop, it would travel 3.125 meters of distance.

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##### ISBN: 9780321675460

The full step-by-step solution to problem: 27E from chapter: 5 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. The answer to “A stockroom worker pushes a box with mass 11.2 kg on a horizontal surface with a constant speed of 3.50 m/s. The coefficient of kinetic friction between the box and the surface is 0.20. (a) What horizontal force must the worker apply to maintain the motion? (b) If the force calculated in part (a) is removed, how far does the box slide before coming to rest?” is broken down into a number of easy to follow steps, and 66 words. This textbook survival guide was created for the textbook: University Physics, edition: 13. This full solution covers the following key subjects: box, Worker, surface, horizontal, Force. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. University Physics was written by and is associated to the ISBN: 9780321675460. Since the solution to 27E from 5 chapter was answered, more than 737 students have viewed the full step-by-step answer.

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