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Over the summer I worked as a cotton candy vender. What that involves is walking up and down the steps at frontier field holding a rack of 40 cotton candies above my head. This can represent newton's 3rd law because to keep my arm up I have to match the force that the cotton candy rack is pushing down on me. By the end of the night my arm would be sore because to match the weight pushing down I had to exhibit the same amount of force in order to keep it up.
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