An ice skater is spinning in a circle with a constant angular speed ( 0 ) with h

ID: 1506672 • Letter: A

Question

An ice skater is spinning in a circle with a constant angular speed ( 0 ) with her arms extended out. She brings her arms in.

i. After she brings her arms in, for the system of just the skater, her angular momentum is:
1. the same as when her arms were extended out.

2. smaller than when her arms were extended out.

3. larger than when her arms were extended out.

4. not possible to determine without more information.

ii. After she brings her arms in, her angular speed is:

1.the same as 0

2. larger than 0

3. smaller than 0

4. not possible to determine without more information.

iii. After she brings her arms in, for the system of just the skater, how do the following quantities change? (choose all)

. Her moment of inertia remains the same.

Her moment of inertia decreases.

Her moment of inertia increases.

Her rotational kinetic energy increases.

Her rotational kinetic energy decreases.

Her rotational kinetic energy remains the same.

1. the same as when her arms were extended out.

2. larger than 0

Her moment of inertia decreases
Her rotational kinetic energy increases.

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