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The SI unit of rotational inertia is

The SI unit of rotational inertia is Correct Answer kg m<sup>2</sup>

The correct answer is option 4) i.e. kg m2

CONCEPT:

  • Rotational inertia: It is the measure of the resistance offered by a body to angular acceleration about a given axis. Hence, this is a property of objects that can be rotated.
    • Rotational inertia is the equivalent of mass in linear mechanics. It depends on the mass and distribution of mass of the object.
    • The rotational inertia is commonly called the moment of inertia.

The moment of inertia of any object rotating at radius rr from the axis of rotation is given by:

​I = mr2

Where I is the moment of inertia and m is the mass of the object.

EXPLANATION:

Moment of inertia, I = mr2​

  • The SI units of mass m and radius r are kg and m respectively. Hence, the SI unit of rotational inertia is kg m2.

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