Question: 1. A solid aluminum shaft, 6 ft in length, is to transmit a torque of 350 lb-ft. The allowable shear stress is 5000 psi and the angle of twist must not exceed 4° in a 6-ft length. Select the required diameter.
2. A 25-mm-diameter solid shaft with an allowable shear stress of 60 MPa rotates at a speed of 15 r/s. Determine the maximum power that can be transmitted by this shaft.