A Playground Merry-Go-Round with a Radius of 1

question 33

Multiple Choice

A playground merry-go-round with a radius of 1.8 m and a rotational inertia of 120 kg m² is stationary. A child with a mass of 25 kg gets on and walks around the edge of the merry-go-round. How many revolutions around the merry-go-round must the child make in order for the merry-go-round to make one full revolution?

• A)2.5 revolutions
• B)1.5 revolutions
• C)3.0 revolutions
• D)1.0 revolutions
• E)2.0 revolutions

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