In using this leg curl machine the exertion of the legs results in a torque
M = 120 lb-ft on the shaft that connects to cord disk. The cord disk has a radius R = 8 in. Determine the resulting tensile stress in the 0.125 in. diameter steel cable within the cord that wraps around the cord disk. Assume that frictionless bearings allow the shaft–cord disk assembly to rotate freely in place.

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$2.17 In using this leg curl machine the exertion of the legs results in a torque $ M=120 \mathrm{lb}-\mathrm{ft} $ on the s$

2.17 In using this leg curl machine the exertion of the legs results in a torque $ M=120 \mathrm{lb}-\mathrm{ft} $ on the shaft that connects to cord disk. The cord disk has a radius $ R=8 $ in. Determine the resulting tensile stress in the $ 0.125 $ in. diameter steel cable within the cord that wraps around the cord disk. Assume that frictionless bearings allow the shaft-cord disk assembly to rotate freely in place.

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