Answered: B Pole 1.0 m Cable 30° Pulley 5.0 m a T…

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 cable and pulley system at D is used to
bring a 230-kg pole (ACB) to a vertical position, as
shown in the figure part a. The cable has tensile force
T and is attached at C. The length L of the pole is
6.0 m, the outer diameter is d = 140 mm, and the wall
thickness is t = 12 mm. The pole pivots about a pin at
A in figure part b. The allowable shear stress in the pin
is 60 MPa and the allowable bearing stress is 90 MPa.
Find the minimum diameter of the pin at A in
order to support the weight of the pole in the position
shown in the figure part a.

B
Pole
1.0 m
Cable
30°
Pulley
5.0 m
a
T
D
4.0 m
(a)
-ACB
АСВ
- Pin
Pin supporte
plates
(b)

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