Solved: A 20-mm-diameter steel bar is to be used as a
Chapter 3, Problem 3-60(choose chapter or problem)
A 20-mm-diameter steel bar is to be used as a torsion spring. If the torsional stress in the bar is not to exceed 110 MPa when one end is twisted through an angle of \(15^{\circ}\), what must be the length of the bar?
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