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Conclusion:
Moment of inertia, also called mass moment of inertia or the angular mass, is a
measure of an object’s resistance to changes in its rotation rate. Moment of inertia is the
inertia of a rigid rotating body with respect to its rotation. The moment of inertia can be
found by using the relationships between linear acceleration, angular acceleration,
tension, and torque. The moment of inertia of an object about a given axis describes how
difficult it is to change its angular motion about that axis. For example, two disks that
have the same mass and thickness, but different radii will require different amount of
effort to accelerate each one. It requires more effort to rotate the disk that has a larger
radius because its mass is distributed further from its axis of rotation. Mass further out
must move more quickly than the mass closer in. The moment of inertia can also change
if the shape changes. For example, when ice skaters skate, they go faster when they move
their arms closer to their body. The moment of inertia has two forms, a scalar form and a
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 Spring '06
 mr

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