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2. A 40.0 kg child plays on a swing that is made of a tire as a seat and one long rope that is 4.00 m long from a pivot. a) W
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a Pivot l=um 0 = 20 sino mg - (a) [= (mg) (l sino) = (10.0x 9,8x (4x sin 20) = 536 N (b) a = 2² r= radius 2 = 16 m/s²

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