# Problem: A merry-go-round spins freely when Janice moves quickly to the center along a radius of the merry-go-round. It is true to say that (A) the moment of inertia of the system decreases and the angular speed increases. (B) the moment of inertia of the system decreases and the angular speed decreases. (C) the moment of inertia of the system decreases and the angular speed remains the same. (D) the moment of inertia of the system increases and the angular speed increases. (E) the moment of inertia of the system increases and the angular speed decreases.

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A merry-go-round spins freely when Janice moves quickly to the center along a radius of the merry-go-round. It is true to say that

(A) the moment of inertia of the system decreases and the angular speed increases.

(B) the moment of inertia of the system decreases and the angular speed decreases.

(C) the moment of inertia of the system decreases and the angular speed remains the same.

(D) the moment of inertia of the system increases and the angular speed increases.

(E) the moment of inertia of the system increases and the angular speed decreases.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Conservation of Angular Momentum concept. You can view video lessons to learn Conservation of Angular Momentum. Or if you need more Conservation of Angular Momentum practice, you can also practice Conservation of Angular Momentum practice problems.

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Based on our data, we think this problem is relevant for Professor Leduc's class at SDSU.