Moment of inertia | Unit

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Definition of a moment of inertia: 


The moment of inertia also called a mass moment of inertia, angular mass or rotational inertia. The moment of inertia is a quantity expressing a tendency of the body to resist angular acceleration about a rotational axis. It is similar to how mass determines the force needed for the desired acceleration. 

Mathematically, the moment of inertia is the sum of the products of the mass of each particle in the body with the square of its distance from the axis of rotation. 

Units of a moment of inertia: 


SI Unit: kg m2

Other Unit: lbf ft s2

Dimension: M L2

Moment of inertia usually denoted by I. 

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