Engineering Mechanics: Statics
8th Edition
ISBN: 9781118807330
Author: James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher: WILEY
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Textbook Question
Chapter 3.5, Problem 110P
The device shown in section can support the load L at various heights by resetting the pawl C in another tooth at the desired height on the fixed vertical column D. Determine the distance b at which the load should be positioned in order for the two rollers A and B to support equal forces. The weight of the device is negligible compared with L.
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In the special position shown for the log hoist, booms AF and EG are at right angles to one another and AF is perpendicular
to AB. If the hoist is handling a log weighing 4380 lb, compute the magnitudes of the forces supported by the pins at A and D
in this one position due to the weight of the log.
50°
A =
Answers:
i
D= i
15"
A
13'
26"
B
eTextbook and Media
E
C
lb
lb
R
10"
3'
-"(
14'
G
The pulley at D is frictionless and the cylinder weighs 180 Ib.
a. Determine the vertical reaction (Ib) of the hinge. Indicate its direction, use positive value if it is
upward and negative if it's downward.
b. Determine the horizontal reaction (Ib) of the hinge. Indicate its direction, use positive value if it's
to the right and negative if it's to the left.
c. Determine the tensile force (Ib) on the cable.
A
B
C
5 ft
5 ft
-3 ft
Also determine the magnitude of the force at O. Express your answer in units of N.
Chapter 3 Solutions
Engineering Mechanics: Statics
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