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

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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

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Engineering Mechanics Statics

ISBN: 978-0132215008

11 Edition

Authors: Russell C. Hibbeler

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Question Posted: Jun 11, 2010 10:03 AM

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

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D

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From FBD a F 0 W 2 F sin0 W 2 sin8 F From FBD b EMD0 N...View the full answer

Engineering Mechanics Statics

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