The diagram above shows a top view of a child of mass $M$ on a circular platform of mass $5M$that is rotating counterclockwise. Assume the platform rotates without friction. Which of the following describes an action by the child that will result in an increase in the total angular momentum of the child-platform system?

Question

The diagram above shows a top view of a child of mass $M$ on a circular platform of mass $5M$that is rotating counterclockwise. Assume the platform rotates without friction. Which of the following describes an action by the child that will result in an increase in the total angular momentum of the child-platform system?(a) The child moves toward the center of the platform.
, (b) The child moves away from the center of the platform.
, (c) The child moves along a circle concentric with the platform (dashed line shown) opposite the direction of the platform’s rotation.
, (d) None of the actions described will change the total angular momentum of the child-platform system.
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Rachel · Accepted Answer

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