Question 1: A weight of 18,000 lb is supported on a rectangular baseplate that is 9-in. wide and 2-ft long.


1: A weight of 18,000 lb is supported on a rectangular baseplate that is 9-in. wide and 2-ft long. The baseplate rests on a concrete slab. Determine the stress that the baseplate exerts on the concrete slab. Express your answer in units of (a) lbft2 (precision of 1 for (a) and of 1000 for (b)).
2: A ¼-in. diameter rod must be machined on a lathe to a smaller diameter for use as a specimen in a tension test. The rod material is expected to break at a normal stress of 63,750 psi. If the tensile testing machine can apply no more than 925 lb of force to the specimen, calculate the maximum rod diameter that should be used for the specimen (precision of 0.000).
: Determine the maximum load that a 0.50-in. diameter steel rod can support if the normal stress in the rod must not exceed 24,000 psi (precision of 100).
4: A 4-in. wide by 1.125-in. thick rectangular steel bar supports a load of P in tension. Determine:
The stress in the bar if P = 32,000 lb (precision of 100)
The load P that can be supported by the bar if the axial stress must not exceed 25,000 psi (precision of 10,000)
: A 35-ft long solid steel rod is subjected to a load of 8,000 lb. This load causes the rod to stretch 0.266 in. The modulus of elasticity of the steel is 30,000,000 psi. Determine the diameter of the rod (precision of 0.00).


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