The manually operated apple cider press shown has a 36-in. handle. The square-threaded scr...

The manually operated apple cider press shown has a 36-in. handle. The square-threaded screw has a mean diameter of 1.700 in. The screw must be turned through  turns to advance the head of the press 1.00 in. The coefficient of static friction is estimated to be 0.13.

(a) Find the force on the stack if a force of 60 lb is applied at each end of the handle.

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(b) How much is the resulting force decreased if the coefficient of static friction goes to 0.18 due to lack of lubrication on the screw?

Problem