(Solution) - The column is used to support the upper floor If the force F -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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The column is used to support the upper floor. If the force F is removed from the handle of the jack, determine if the screw is self-locking.. The square-threaded screw on the jack has a coefficient of static friction ?s, mean diameter d, and a lead h.

Given:
F = 80 N ? s = 0.4 d = 25 mm
h = 3 mm a = 0.5 m