the lever shown in the figure has diameter the lever shown in the figure has dia
ID: 1839087 • Letter: T
Question
the lever shown in the figure has diameter the lever shown in the figure has diameter the lever shown in the figure has diameter the lever shown in the figure has diameter the lever shown in the figure has diameter CHomework 2 Problem 3.24 The bar DA is rigld and is onginally held in the hortzontal posilion when the weight W. supported tom C Thew res are made of 436 steel and have a cross-sectional area of 0.009 in2 (Figure 1) ? Part A If the weight causes B to dsplace dowward 0.025 in., delemine the strain in wires DB and BC Express your answers, separated by a comma, to three significant figures in/in Figure Submit ReguestAnswwer ?PartB Delermine the weight W Express your answer to three significant figures and include appropriate units. W 18125 lbExplanation / Answer
A)displacement of B=0.025 in
downward displacement of D=(5/3)*0.025=0.0417 in
length of DE=3 ft=36 in
strain in DE=0.0417/36=0.0012
modulus of elasticity of steel=29000 ksi
stress in DE=29000*0.0012=33.56 ksi
area of bar=0.009 in2
axial load in DE=0.009*33.56=0.302 kips
considering moment equilibrium about A, 0.302*5=W*3
W=0.503 kips
axial stress in BC=0.503/0.009=55.94 ksi
strain in BC=55.94/29000=0.0019
Part B:
weight = 0.503*1000=503 lbs
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