A cat is able to land on its feet after a fall. Which principle of physics is being used? Explain

Explanation

A cat is able to land on its feet after a fall. This is based on law of conservation of angular momentum. When the cat is about to fall, it curls its body to decrease the moment of inertia and increase its angular velocity. When it lands it stretches out its limbs. By which it increases its moment of inertia and inturn it decreases its angular velocity. Hence, the cat lands safely.