Answer :

moment of Inertia of a ring or hoop is I=MR²
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▶Moment of inertia of a ring
=> I = MR^2

Moment of inertia➫ A measure of a body's resistance to angular acceleration, equal to the product of the mass of the body & the square of its distance from the axis of rotation.

Examples:-
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The moment of inertia of a compound pendulum constructed from a thin disc mounted at the end of a thin rod that oscillates around a pivot at the other end of the rod, begins with the calculation of the moment of inertia of the thin rod and thin disc about their respective centers of mass.

❱ It is also called angular mass.

❱ It is a rotating body's resistance to angular acceleration or deceleration.

❱ It's SI unit is kg m^2.

❱ The mass of a body is roughly a measure of its inertia or resistance to a change in its state of motion.

❱ It is the perpendicular distance from the axis of rotation to a point mass.

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