A 300- kg child swings on a playground swing 33 m long what, Ask an Expert

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A 30.0- kg child swings on a playground swing 3.3 m long. What is the period of her motion? If her older brother, who weighs twice as much as she does, rides in the swing instead, what is the period of the motion? Assume the center of mass to be at the position of the seat in both cases.

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