You do 220 j of work pulling your sister back on a swing
You do 220 J of work pulling your sister back on a swing, whose chain is 5.00 m long, until the swing makes an angle of 30.0 degrees with the vertical and your sister is at rest. What is your sisters mass?
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you do 220 j of work pulling your sister back on a swing whose chain is 500 m long until the swing makes an angle of
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