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?
A. 177 J
B. 140 J
O
C. 539 J
D. 160 J
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Answers: 2
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A 25 kg child plays on a swing with support ropes that are 2.2 m long. A friend pulls her back
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