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Get Full Access to Vector Mechanics For Engineers: Statics - 10 Edition - Chapter 8 - Problem 8.74
Get Full Access to Vector Mechanics For Engineers: Statics - 10 Edition - Chapter 8 - Problem 8.74

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# In the gear-pulling assembly shown the square-threaded screw AB has a mean radius of 15

ISBN: 9780077402280 491

## Solution for problem 8.74 Chapter 8

Vector Mechanics for Engineers: Statics | 10th Edition

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Problem 8.74

In the gear-pulling assembly shown the square-threaded screw AB has a mean radius of 15 mm and a lead of 4 mm. Knowing that the coefficient of static friction is 0.10, determine the couple that must be applied to the screw in order to produce a force of 3 kN on the gear. Neglect friction at end A of the screw.

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PY 205 with Daniel Dougherty Week 1 Chapter 1 1/12/2016  Theory – broader, more detailed and can give quantitatively testable predictions, often with great precision  Law – certain, concise but general statements about how nature behaves  Principle- less general statements o Scientific laws are descriptive because they describe how mature behaves  Uncertainty and percent uncertainty o Ratio of uncertainty to the measured value X 100 to make it a percent o Ex: 8.8 +/- .1cm .1/8.8 X 100 = 1%  Significant figures o 0 is a placeholder o Ex: 80  one significant figure since 0 does not count o RULE: number of significant figures in the last number should be the s

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