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A 25 kg child plays on a swing with support ropes that are 2.2 m long....

A 25 kg child plays on a swing with support ropes that are 2.2 m long. A friend pulls her back until the ropes are 42.2° from the vertical and releases her from rest. What is the potential energy for the child just as she is released compared with the potential energy at the bottom of the swing?

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