A Boy and a Girl Are Riding on a Merry-Go-Round

question 88

Multiple Choice

A boy and a girl are riding on a merry-go-round that is turning. The boy is twice as far as the girl from the merry-go-round's center. If the boy and girl are of equal mass, which statement is true about the boy's moment of inertia with respect to the axis of rotation?

• A) His moment of inertia is 4 times the girl's.
• B) His moment of inertia is twice the girl's.
• C) The moment of inertia is the same for both.
• D) The boy has a greater moment of inertia, but it is impossible to say exactly how much more.
• E) The boy has a smaller moment of inertia, but it is impossible to say exactly how much smaller.

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