A rotary lawnmower blade rotates at 3500 rev/min. The
Chapter 3, Problem 3.109(choose chapter or problem)
A rotary lawnmower blade rotates at 3500 rev/min. The steel blade has a uniform cross section 1 8 in thick by 11 4 in wide, and has a 1 2-in-diameter hole in the center as shown in the figure. Estimate the nominal tensile stress at the central section due to rotation.
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