The symmetrical crab hook is used to lift packages by means of friction developed between the shoes

Question:

The symmetrical crab hook is used to lift packages by means of friction developed between the shoes A and B and a package. Determine the smallest coefficient of static friction at the shoes so that the package of weight W can be lifted.


Given:

a = 1 ft

b = 2 ft

c = 0.8 ft

d = 1 ft

θ = 45 deg



D


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