The coefficients of friction are s = 0.40 and k = 0.30 between all surfaces of contact.

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The coefficients of friction are μs = 0.40 and μk = 0.30 between all surfaces of contact. Determine the force P for which motion of the 60-lb block is impending if cable AB

(a) Is attached as shown,

(b) Is removed.




B. 40 lb 60 1Ь


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