A teacher is planning to demonstrate the principle of energy conservation to his class by bungee jumping from the scaffolding in the school's gym. He has a mass of 120 kg, and the scaffolding is 25 m above the ground. a) How much potential energy would the teacher have at that location? Explain/Show your work. b) If the teacher wants to have the bungee stop his motion when he is 2 meters above the gym floor, how much energy will the bungee need to absorb? Explain/Show your work. c) If he orders a bungee cord with an unstretched length of 8 m, what spring constant should he be sure to get in order to safely perform this demonstration? Explain/Show your work.

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