A hollow shaft has outside diameter 120 mm and thickness 20 mm. Find the polar moment of inertia (J).

A hollow shaft has outside diameter 120 mm and thickness 20 mm. Find the polar moment of inertia (J). Correct Answer 16.36 × 106 mm4

D = 120mm t= 20mm & d = D – 2t = 80mm. Polar moment of inertia (J) is π/32 ×. π/32 × . 16.36 × 106 mm4.
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