Angular momentum is also conserved. If you have ever watched a figure skate spinning, you will have noticed that when she pulls her arms in tight she spins more quickly, and when she stretches her arms out wide she spins more slowly. This demonstrates the conservation of angular momentum. Since angular momentum is a product of rotational inertia and rotational velocity, changing one will change the other. Consider the example below. When the mass is farther from the center, the rotational inertia increases and the rotational velocity decreases. This also explains why divers in a tight tuck can spin more quickly when diving