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A 25-kg child is sitting on the seat of a swing 10 m long. Her father pulls the swing back until the swing makes an angle of 37 degrees with the vertical. The gain in potential energy of the child at this point is?
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Question: In this problem you will derive two different formulas for the power delivered to a resistor. What is the power P supplied to a resistor whose resistance is R when it is known that it has a voltage V across it? ...
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