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# You walk into an elevator, step onto a scale, and push the ISBN: 9780321675460 31

## Solution for problem 8E Chapter 4

University Physics | 13th Edition

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Problem 8E

You walk into an elevator, step onto a scale, and push the “up” button. You recall that your normal weight is 625 N. Draw a free-body diagram. (a) When the elevator has an upward acceleration of magnitude 2.50 m/s2, what does the scale read? (b) If you hold a 3.85-kg package by a light vertical string, what will be the tension in this string when the elevator accelerates as in part (a)?

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Solution 8E Your normal weight = 625 N Acceleration due to gravity g = 9.80 m/s 2 Therefore, your mass m = 625 N/(9.80 m/s ) 2 m = 63.7 kg 2 (a) The elevator has an upward acceleration of 2.5 m/s . The free body diagram can be drawn as shown below. The elevator has an upward acceleration. Therefore, the net acceleration will be 2 2 2 a net= g + a = 9.80 m/s + 2.50 m/s = 12.3 m/s Your mass is m = 63.7 kg Therefore, when the elevator accelerates up, the...

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##### ISBN: 9780321675460

This textbook survival guide was created for the textbook: University Physics, edition: 13. University Physics was written by and is associated to the ISBN: 9780321675460. The full step-by-step solution to problem: 8E from chapter: 4 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. Since the solution to 8E from 4 chapter was answered, more than 317 students have viewed the full step-by-step answer. The answer to “You walk into an elevator, step onto a scale, and push the “up” button. You recall that your normal weight is 625 N. Draw a free-body diagram. (a) When the elevator has an upward acceleration of magnitude 2.50 m/s2, what does the scale read? (b) If you hold a 3.85-kg package by a light vertical string, what will be the tension in this string when the elevator accelerates as in part (a)?” is broken down into a number of easy to follow steps, and 72 words. This full solution covers the following key subjects: elevator, string, Scale, onto, diagram. This expansive textbook survival guide covers 26 chapters, and 2929 solutions.

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