Answer: The column is used to support the upper floor. If

Chapter 8, Problem 8-69

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QUESTION:

The column is used to support the upper floor. If a force F = 80 N is applied perpendicular to the handle to tighten the screw, determine the compressive force in the column. The square-threaded screw on the jack has a coefficient of static friction of \(\mu_{\mathrm{s}}\) = 0.4, mean diameter of 25 mm, and a lead of 3 mm

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QUESTION:

The column is used to support the upper floor. If a force F = 80 N is applied perpendicular to the handle to tighten the screw, determine the compressive force in the column. The square-threaded screw on the jack has a coefficient of static friction of \(\mu_{\mathrm{s}}\) = 0.4, mean diameter of 25 mm, and a lead of 3 mm

ANSWER:

Step 1 of 3

The moment equilibrium equation of the screw is

From here we can express  as:

The moment in the screw is:

 is radius

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