A playground merry-go-round has radius 2.90m and moment of inertia 2500kg?m2 about a vertical axle through its center, and it turns with negligible friction.
A child applies an 22.5N force tangentially to the edge of the merry-go-round for 24.0s . If the merry-go-round is initially at rest, what is its angular speed after this 24.0s interval?
How much work did the child do on the merry-go-round?
What is the average power supplied by the child?