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CBSE Class 11-science Answered

derive a relation between angular momentum and law of inertia. hence define moment of inertia.
Asked by Jisha Mary Thomas | 10 Sep, 2013, 07:14: PM
Expert Answer

We know that

Angular momentum is given by,

L = mv *r

= (mr2)(v/r)

= I?

Where, I = moment of inertia = mr2

? = v/r = angular velocity.

Moment of inertia of a body about a given axis is the sum of the products of masses of all the particles of the body and squares of their respective perpendicular distance from the axis of rotation. It is a rotational analog of the mass of a body.

It is given as

I = MR2

where M is the mass of the body and R is its rotational radius.

Answered by | 11 Sep, 2013, 02:28: PM
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