Taking a leap of faith, a bungee jumper steps off a plat-form and falls until the cord brings her to rest. Suppose you analyze this system by choosing y = 0 at the platform level, and your friend chooses y = 0 at ground level. (a) Is the jumper’s initial potential energy in your calculation greater than, less than, or equal to the same quantity in your friend’s calculation? Explain. (b) Is the change in the jumper’s potential energy in your calculation greater than, less than, or equal to the same quantity in your friend’s calculation? Explain.
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