A solid circular shaft and a tubular shaft, both with the same outer radius of c=co = 0.600in , are being considered for a particular design. The tubular shaft has an inner radius of ci = 0.300in The shafts are to be powered by a motor operating at a frequency of f = 2.10Hz and are to handle an attached load. Assume the cross sections are uniform throughout the lengths of the shafts and that the materials have an allowable shear stress of ?allow = 14.5ksi .

Determine the maximum sustainable torque that the solid shaft can handle.

Determine the maximum sustainable torque that the tubular shaft can handle.

Determine the maximum sustainable power that the solid circular shaft can handle without failing.

Determine the maximum sustainable power that the tubular circular shaft can handle without failing.