Define angular momentum, write its unit and obtain relation for angular momentum in terms of moment of inertia and angular velocity.

Explanation

### Step-by-Step Solution:

1. **Definition of Angular Momentum**:
Angular momentum (\( \mathbf{L} \)) of a particle about a point is defined as the cross product of the position vector (\( \mathbf{r} \)) from the point to the particle and the linear momentum (\( \mathbf{p} \)) of the particle. Mathematically, it is expressed as:
\[ \mathbf{L} = \mathbf{r} \times \mathbf{p} = \mathbf{r} \times (m \mathbf{v}) \]
where:
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