Attempt any SIX :
Define radius of gyration and give its physical significance.

Explanation

### Step-by-Step Solution

**Step 1: Define the Radius of Gyration**
The radius of gyration (denoted as \( k \)) of a body about a given axis is defined as the distance from the axis of rotation to a point where the entire mass of the body can be assumed to be concentrated without changing its moment of inertia about that axis. Mathematically, it can be expressed as:
\[ k = \sqrt{\frac{I}{m}} \]
where \( I \) is the moment of inertia of the body about the axis, and \( m \) is the total mass of the body.
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