Problem 8.45 The three bars have a weight of WA = 20 lb, WB 40 lb, and Wc = 60 lb, respectively. (Figure 1) Part A If the coefficients of static friction at the surfaces of contact are as shown, determine the smallest horizontal force P needed to move block A. Express your answer to three significant figures and include the appropriate units.
Problem 8.45 The three bars have a weight of WA = 20 lb, WB 40 lb, and Wc = 60 lb, respectively. (Figure 1) Part A If the coefficients of static friction at the surfaces of contact are as shown, determine the smallest horizontal force P needed to move block A. Express your answer to three significant figures and include the appropriate units.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Problem 8.45
The three bars have a weight of WA = 20 lb,
WB = 40 lb, and Wc = 60 lb, respectively.
(Figure 1)
Figure 1
of 1
>
CPCB=0.5
BMBA=0.3
A MAD=0.2 P
D
Part A
If the coefficients of static friction at the surfaces of contact are as shown, determine the smallest
horizontal force P needed to move block A.
Express your answer to three significant figures and include the appropriate units.
μA
P= Value
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