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A machine part consists of a thin 40.0-cm-long bar with

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman ISBN: 9780321675460 31

Solution for problem 43E Chapter 5

University Physics | 13th Edition

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University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

University Physics | 13th Edition

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Problem 43E

A machine part consists of a thin 40.0-cm-long bar with small 1.15-kg masses fastened by screws to its ends. The screws can support a maximum force of 75.0 N without pulling out. This bar rotates about an axis perpendicular to it at its center. (a) As the bar is turning at a constant rate on a horizontal, frictionless surface, what is the maximum speed the masses can have without pulling out the screws? (b) Suppose the machine is redesigned so that the bar turns at a constant rate in a vertical circle. Will one of the screws be more likely to pull out when the mass is at the top of the circle or at the bottom? Use a free-body diagram to see why. (c) Using the result of part (b), what is the greatest speed the masses can have without pulling a screw?

Step-by-Step Solution:

Solution 43E Step 1 of 4: v2 The mass moves circular path,so the acceleration israd= R ,directed toward the centre of path Step 2 of 4: a) F xma x 2 F=ma rad=m R =75 N FR v = m v = (75)(0.2) 1.15 =3.61 m/s Step 3 of 4: b) At the top F yma y So F=ma rad- mg At the bottom F xma x So F=ma rad+mg The value of F required is larger at the bottom of the path

Step 3 of 4

Chapter 5, Problem 43E is Solved
Step 4 of 4

Textbook: University Physics
Edition: 13
Author: Hugh D. Young, Roger A. Freedman
ISBN: 9780321675460

The full step-by-step solution to problem: 43E from chapter: 5 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. Since the solution to 43E from 5 chapter was answered, more than 409 students have viewed the full step-by-step answer. The answer to “A machine part consists of a thin 40.0-cm-long bar with small 1.15-kg masses fastened by screws to its ends. The screws can support a maximum force of 75.0 N without pulling out. This bar rotates about an axis perpendicular to it at its center. (a) As the bar is turning at a constant rate on a horizontal, frictionless surface, what is the maximum speed the masses can have without pulling out the screws? (b) Suppose the machine is redesigned so that the bar turns at a constant rate in a vertical circle. Will one of the screws be more likely to pull out when the mass is at the top of the circle or at the bottom? Use a free-body diagram to see why. (c) Using the result of part (b), what is the greatest speed the masses can have without pulling a screw?” is broken down into a number of easy to follow steps, and 144 words. This full solution covers the following key subjects: screws, bar, Masses, pulling, part. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. University Physics was written by and is associated to the ISBN: 9780321675460. This textbook survival guide was created for the textbook: University Physics, edition: 13.

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