Conversation of angular momentum states that when a body contracts, its spin rate....?

Question

(1) increases (2) decreases (3) stays constant (4) disappears

Answer 1

Recall that angular momentum is given by the formula
L = I*omega
where L = angular momentum, I = moment of inertia, and omega = angular velocity.

Angular momentum is conserved. This means that for a given closed system, the angular momentum cannot change.

If a body contracts, its moment of inertia decreases. For L to remain constant, omega must increase, so the object starts spinning faster. A good example of this is a figure skater doing a spin. Watch how they speed up when they bring in their arms (lowering their moment of inertia).

Here's a helpful video:
http://www.youtube.com/watch?v=V3UsrfHa4MQ

Answer 2

1

Answer 3

#1, increases

Answer 4

it increases