# Answer on Mechanics | Relativity Question for brawlf

Question #7565

What is the moment of inertia for a 0.15-Kg billiard ball that has a radius of 0.1m?

Expert's answer

Solid ball of mass m and radius R, rotating around an axis which passes through the center, has the moment of inertia

I = 2/5·m·R².

So, the moment of inertia for a 0.15-Kg billiard ball that has a radius of 0.1m is

I = 2/5·0.15·0.1² = 3/5000 kg·m².

I = 2/5·m·R².

So, the moment of inertia for a 0.15-Kg billiard ball that has a radius of 0.1m is

I = 2/5·0.15·0.1² = 3/5000 kg·m².

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