Question: 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

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 μs, mean diameter d, and a lead h.

Given:

F = 80 N μ s = 0.4 d = 25 mm

h = 3 mm a = 0.5 m

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