A playground merry-go-round of radius R = 2.0 m has a moment of inertia I = 250 kg m² and is rotating at 10.0 rev/min about a frictionless vertical axle. Facing the axle, a 25.0 kg child hops onto the merry-go-round and manages to sit down on the edge. What is the new angular speed of the merry-go-round?
University of Ilorin PHY101 2026-exam past question
- 7.14 rev/min
- 10.0 rev/min
- 8.33 rev/min
- 5.00 rev/min
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