Rod Moment of Inertia About One End
Easymass moment of inertiaparallel axis
A uniform slender rod has mass 10 kg and length 2 m. Its mass moment of inertia about an axis through one end, perpendicular to the rod, is:
- A3.33 kg·m²
- B6.67 kg·m²
- C10.0 kg·m²
- D13.3 kg·m²
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Answer: D. 13.3 kg·m²
About the end, I = mL²/3 = 10(4)/3 = 13.3 kg·m². The same result follows from 3.33 + m(L/2)² = 3.33 + 10.
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