A Playground Merry-Go-Round Has a Radius R and a Rotational

question 28

Multiple Choice

A playground merry-go-round has a radius R and a rotational inertia I. When the merry-go-round is at rest, a child with mass m runs with speed v along a line tangent to the rim and jumps on. The angular velocity of the merry-go-round is then:

• A) mv/I
• B) v/R
• C) mRv/I
• D) 2mRv/I
• E) mRv/(mR²v + I)

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