Conservation of Angular Momentum Video Lessons

Concept

# 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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###### Problem Details

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.