A father has mass 60 kg and the mass of his on is 30 kg . What is the ratio of inertia of the father to the inertia of his son ?

Explanation

To find the ratio of the moment of inertia of the father to that of his son, we can follow these steps:

### Step 1: Understand the concept of inertia
Inertia is the property of a body to resist changes in its state of motion. The moment of inertia (I) is directly proportional to the mass (m) of the object. Therefore, we can say that:
\[ I \propto m \]

### Step 2: Write the formula for the ratio of inertia
The ratio of the moment of inertia of the father (If) to that of the son (Is) can be expressed as:
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