Question: The basic components of a clamping device are bar AB, locking plate CD, and lever EFG; the dimensions of the slot in CD are slightly

The basic components of a clamping device are bar AB, locking plate CD, and lever EFG; the dimensions of the slot in CD are slightly larger than those of the cross section of AB. To engage the clamp, AB is pushed against the work piece, and then force P is applied. Knowing that P = 40 lb and neglecting the friction force between the lever and the plate, determine the smallest allowable value of the coefficient of static friction between the bar and the plate.


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