Physics
posted by Ray .
In a playground, there is a small merrygoround of radius 1.20 m and mass 190 kg. Its radius of gyration (see Problem 85 of Chapter 10) is 91.0 cm. A child of mass 44.0 kg runs at a speed of 4.50 m/s along a path that is tangent to the rim of the initially stationary merrygoround and then jumps on. Neglect friction between the bearings and the shaft of the merrygoround.
(b) Calculate the magnitude of the angular momentum of the child, while running, about the axis of rotation of the merrygoround.
(c) Calculate the angular speed of the merrygoround and child after the child has jumped on.
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