Question: The jacking mechanism consists of a link that has a square-threaded screw with a mean diameter of 0.5 in. and a lead of 0.20 in.,

The jacking mechanism consists of a link that has a square-threaded screw with a mean diameter of 0.5 in. and a lead of 0.20 in., and the coefficient of static friction is ?_s = 0.4. Determine the torque M that should be applied to the screw to start lifting the 6000-lb load acting at the end of member ABC.

6000 lb 7.5 in. 10 in. 10 in.- 15 in. 20 in.

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