How does moment of inertia affect angular velocity?

1 Answer
Oct 22, 2015

Answer:

Like this:

Explanation:

The expression for angular momentum is:

#L=Ixxomega#

Where #I# is the moment of inertia and #omega# is the angular velocity.

Angular momentum is conserved so if #I# is decreased you can see from the expression that #omega# must increase.

The skater in the graphic has utilised this principle. She brings in her arms to decrease her moment of inertia. As a result her angular velocity has increased i.e she spins faster.

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