How does an ice-skater, a ballet dancer or an acrobat take advantage of the principle of conservation of angular momentum ?

Explanation

To understand how an ice-skater, ballet dancer, or acrobat takes advantage of the principle of conservation of angular momentum, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding Angular Momentum**:
- Angular momentum (L) is defined as the product of the moment of inertia (I) and the angular velocity (ω) of a rotating body:
\[
L = I \cdot \omega
...