A Playground Merry-Go-Round Has a Radius of 3

question 29

Multiple Choice

A playground merry-go-round has a radius of 3.0 m and a rotational inertia of 600 kg∙m².It is initially spinning at 0.80 rad/s when a 20-kg child crawls from the center to the rim.When the child reaches the rim the angular velocity of the merry-go-round is:

• A)0.62 rad/s
• B)0.73 rad/s
• C)0.77 rad/s
• D)0.91 rad/s
• E)1.1 rad/s

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