ecplain moment of inertia
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Moment of inertia, in physics, quantitative measure of the rotational inertia of a body—i.e., the opposition that the body exhibits to having its speed of rotation about an axis altered by the application of a torque (turning force). The axis may be internal or external and may or may not be fixed.
Moment of inertia is the measure of the resistance of a body to angular acceleration about a given axis. It equals the sum of products of the mass of every element in the body and the square of the distance of the element from the axis of movement.
It is the virtue by which a body resists change or remains in constant rotational velocity. An example of a Moment of Inertia in real life is the flywheel of an automobile. A flywheel is a heavy mass of body attached to the crankshaft of the engine. Its magnitude is high and it helps in storing energy. Its SI unit is kg/m².
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