The problem statement, all variables and given/known data A playground merry-go-round has radius 2.00m and moment of inertia 3000kgm² about a vertical axle through its center, and it turns with negligible friction. A child applies an 18.0N force tangentially to the edge of the merry-go-round for 25.0s . If the merry-go-round is initially at rest, what is its angular speed after this 25.0s interval? The attempt at a solution I have no idea what to apply actually. I only thinking of treating the child as a particle. Moment of inertia of child = mr² Can apply consv of angular momentum? But is the child considered to be acting external force? Can someone help me pls? Thanks!!