Solve the following problem given below:
Problem: A 140-N child is in a swing that is attached to ropes 2.20 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.
A. When the ropes are horizontal.
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B. When the ropes make a 26.0° angle with the vertical.
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C. When the child is at the bottom of the circular arc.
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