題組內容

(20%) 3. 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 2.0° in 3.5 meters.
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(b) Repeat part (a) if the shaft is now hollow with inner diameter of 5d/8. Compare 6127449bebd13.jpgValues to corresponding values from part (a). (10%)