Answered: a dpa = 25 mm -L1- C Cable a L2 dpc =…

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 in the figure part
a supports a cage of a mass 300 kg at B. Assume that
this includes the mass of the cables as well. The thickness
of each of the three steel pulleys is t = 40 mm.
The pin diameters are d _pA = 25 mm, d_pB = 30 mm,
and d_pC = 22 mm (see figure part a and part b).
(a) Find expressions for the resultant forces acting
on the pulleys at A, B, and C in terms of cable
tension T.
(b) What is the maximum weight W that can be
added to the cage at B based on the following
allowable stresses? Shear stress in the pins is
50 MPa; bearing stress between the pin and the
pulley is 110 MPa

a
dpa = 25 mm
-L1-
C
Cable
a
L2
dpc = 22 mm
B
dpB = 30 mm-
Cage
W
(a)
109

Cable
Pulley
Pin
adp.
Support
bracket
Cage at B
Section a-a: pulley support
detail at A and C
Section a-a: pulley
support detail at B
(b)

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