PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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Chapter 8, Problem 30P
Two blocks A and B have a weight of 10 Ib and 6 Ib, respectively. They are resting on the incline for which the coefficients of static friction are. μA = 0.15 and, μB = 0.25. Determine the incline angle θ for which both blocks begin to slide. Also find the required stretch or compression in the connecting spring for this to occur. The spring has a stiffness of, k = 2Ib/ft.
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Two blocks A and B have a weight of 11 lb and 5 lb,
respectively. They are resting on the incline for which
the coefficients of static friction are A = 0.16 and μB
= 0.23. Determine the incline angle @ for which both
blocks begin to slide. Also find the required stretch or
compression in the connecting spring for this to occur.
The spring has a stiffness of k = 2.0 lb/ft. (Figure 1)
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Determine the incline angle 0 for which both blocks begin to slide.
Express your answer to three significant figures and include the appropriate units.
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Determine the change of the length of the spring. Assume this change to be positive if the spring is stretched and negative
if the spring is compressed.
Express your answer to three significant figures and include the appropriate units.
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If the beam AD is loaded as shown, determine the horizontal force P which must be applied to the wedge in order to remove it from under the beam. The coefficients of static friction at the wedge's top and bottom surfaces are μCA= 0.30 and μCB= 0.40, respectively. Neglect the weight and size of the wedge and the thickness of the beam.
If P=0, is the wedge self-locking?
Determine the smallest force P that must be applied in order to cause the 150 lb uniform crate to move. The coefficient of static friction between the crate and the floor is us=0.5.
Chapter 8 Solutions
PEARSON ETEXT ENGINEERING MECH & STATS
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