Answered: TT Davit a = 15° Pulley Pin- Cable-

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A lifeboat hangs from two ship’s davits, as
shown in the figure. A pin of diameter d = 0.80 in.
passes through each davit and supports two pulleys,
one on each side of the davit.
Cables attached to the lifeboat pass over the pulleys
and wind around winches that raise and lower
the lifeboat. The lower parts of the cables are vertical
and the upper parts make an angle α =15° with the
horizontal. The allowable tensile force in each cable
is 1800 lb, and the allowable shear stress in the pins
is 4000 psi. If the lifeboat weighs 1500 lb, what is the maximum
weight that can be carried in the lifeboat?

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