Electric Motors and Control Systems
2nd Edition
ISBN: 9780073373812
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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The pillar crane is subjected to the crate having a mass of 1000 kgkg. The boom is held in position shown in (Figure 1).Determine the force in the tie rod ABAB.Determine the horizontal and vertical reactions at the pin support CC.
Problem 7.1
Part A
In (Figure 1), F₁ = 550 lb, F2 = 250 lb, and F3 = 340 lb.
Figure
F
F
B
Part B
Determine the shear force at point C.
Express your answer to three significant figures and include the appropriate units.
Vc=522
?
lb
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Part C
Determine the moment at point C.
Express your answer to three significant figures and include the appropriate units.
1 of 1
Mc = 1867
F
E
D
lb.ft
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Part D
6 ft-
4 ft-
4 ft-
6 ft
12 ft
Sketch h, for Problem 13.64
13
13.65 In Sketch i the tension on the slack side of the left pulley
is 20% of that on the tight side. The shaft rotates at 1000
rpm. Select a pair of deep-groove roller bearings to sup-
port the shaft for 99% reliability and a life of 20,000 hr.
Assume Eq. (13.83) can be used to account for lubricant
cleanliness. All length dimensions are in millimeters.
b
Z
02
0
y
200
500.
187
100
30°
B
TONE 500 diam
800 N
650 diam
100 N
Sketch i, for Problem 13.65
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