Question

is moment of inertia a scalar quantity or vector quantity?

Answer 1

Moment of Inertia is a tensor quantity which means it behaves as scalar and sometimes it behaves as vector quantity
Reason :
Moment of inertia is the property where body resists change in its state of rotatory motion.

Inertia is a measure of mass so it is scalar quantity.
But an object in rotatory motion will change its direction every point to point . Hence it is also vector quantity

Answer 2

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above answer is correct

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Scalar Quantity

Scalar quantity is the Physical quantity that is derived on the basis of magnitude.

Example :-

Distance, speed, mass, etc.

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Vector Quantity

Vector quantity is the physical quantity that requires both magnitude and direction.

Example :-

Acceleration, momentum, displacement, etc.

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