What is the shear stress due to torsion at the surface of a 2-inch diameter solid steel shaft of a home-built high-speed boat that transmits 2500 hp at 2000 rpm? note: bending and axial loads are negligible. give the maximum torsional stress, to the nearest psi.

The maximum stress is 50154 psi.

Explanation:

Torsional equation is applied for steels haft under given condition for maximum torsional stress.  

Step1

Given:

Diameter of shaft is 2 in.

Power transmission is 2500 HP at rotation 2000 RPM.

Calculation:

Step2

Conversion of power transmission is as follows:

lbin/s.

Step3

Torque is calculated as follows:

T = 78781.69 lbin.

Step4

Apply torsional equation for maximum torsional shear stress as follows:

psi.

Or

psi.

Thus, the maximum stress is 50154 psi.

answer:

d. attempt to find the owner, then leave your information if you cannot find them.

explanation:

d. represents both (b) and (c).

more logical as well.

b and c are to complicated.

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