alleryStart learning →In SI units, what are the units of moment of inertia?
Akg times m
Bkg times m/s
Ckg times m^2
Dkg times m^2/s
Answer & Solution
Correct answer: C. kg times m^2
1. Moment of inertia is a sum of terms of the form m r squared.
2. So its units are a mass unit multiplied by a length unit squared.
3. That gives kg times m^2.
4. Adding a per second turns it into angular momentum, a different quantity again.
_Source: OpenStax College Physics (CC BY 4.0), Ch 10 "Rotational Motion and Angular Momentum", section 10.3 Dynamics of Rotational Motion: Rotational Inertia_
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