Physics: merrygoround question
posted by Tessa .
A playground merrygoround of radius 1.92 m has a moment of inertia 411 kg m2 and is rotating at 10.4 rev/min. A child with mass 38.3 kg jumps on the edge of the merrygoround. Assuming that the boy's initial speed is negligible, what is the new angular speed of the merrygoround? Answer in units of rev/min.
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