The square-threaded screw has a mean diameter of 20 mm and a lead of 4 mm. If
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The square-threaded screw has a mean diameter of 20 mm and a lead of 4 mm. If the weight of the plate A is 5lb, determine the smallest coefficient of static friction between the screw and the plate so that the plate does not travel down the screw when the plate is suspended as shown.
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