5. The rigid bar ABC of negligible weight is suspended from three aluminum wires, each of cross-sectional area 0.3 in. Before the load P is applied, the middle wire is slack, being 0.2 in. longer than the other two wires. Determine the largest safe value of P if the working stress for the wires is 12 ksi. Use E =10 x 106 psi for aluminum 60 ft B 4 ft 4 ft

Elements Of Electromagnetics
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Please answer question number 5
5. The rigid bar ABC of negligible weight is suspended from three aluminum wires
each of cross-sectional area 0.3 in. Before the load P is applied, the middle wire is
slack, being 0.2 in longer than the other two wires. Determine the largest safe value
of P if the working stress for the wires is 12 ksi. Use E= 10 x 10 psi for aluminum
60 ft
4 ft
4 ft
6. The rigid bar AB of negligible weight is supported by a pin at O. When the two steel
rods are attached to the ends of the bar, there is a gap D = 4 mm between the lower
end of the left rod and its pin support at C. Compute the stress in the left rod after its
lower end is attached to the support. The cross-sectional areas are 300 mm for rod
AC and 250 mm² for rod BD. Use E = 200 GPa for steel.
Transcribed Image Text:5. The rigid bar ABC of negligible weight is suspended from three aluminum wires each of cross-sectional area 0.3 in. Before the load P is applied, the middle wire is slack, being 0.2 in longer than the other two wires. Determine the largest safe value of P if the working stress for the wires is 12 ksi. Use E= 10 x 10 psi for aluminum 60 ft 4 ft 4 ft 6. The rigid bar AB of negligible weight is supported by a pin at O. When the two steel rods are attached to the ends of the bar, there is a gap D = 4 mm between the lower end of the left rod and its pin support at C. Compute the stress in the left rod after its lower end is attached to the support. The cross-sectional areas are 300 mm for rod AC and 250 mm² for rod BD. Use E = 200 GPa for steel.
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