A playground merry-go-round has a radius of 420m and a, Ask an Expert

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A playground merry-go-round has a radius of 4.20m and a moment of inertia of 255kg m2 and turns with negligible friction about a vertical axle through its center.

A) A child applies a 25.0N force tangentially to the edge of the merry-go-round for 18.0s . If the merry-go-round is initially at rest, what is its angular velocity after this 18.0s interval?

B) How much work did the child do on the merry-go-round?

C) What is the average power supplied by the child?

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Category:- Physics
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