For the following problem, unless noted otherwise use a modulus of rigidity G of 12,000,000 psi (83 000 MPa) for steel and 4,000,000 psi (28 000 MPa) for aluminum.
A 6-ft-long solid steel shaft with a diameter of 4 in. transmits 250 hp at a speed of 250 rpm. Determine whether the following two requirements are satisfied:
(a) The maximum shear stress is not to exceed 10,000 psi.
(b) The angle of twist is not to exceed 1°.
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