A propeller shaft for a small yacht is made ofa solid steel bar 104 mm in diameter. The allowablestress in shear is 48 MPa, and the allowable rate oftwist is 2.08 in 3.5 meters.(a) Assuming that the...

A propeller shaft for a small yacht is made of
a solid steel bar 104 mm in diameter. The allowable
stress in shear is 48 MPa, and the allowable rate of
twist is 2.08 in 3.5 meters.
(a) Assuming that the shear modulus of elasticity
is G = 80 GPa, determine the maximum torque
Tmax that can be applied to the shaft.
(b) Repeat part (a) if the shaft is now hollow with
an inner diameter of 5d/8. Compare T_max
values
to corresponding values from part (a).