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A 60·kg bungee jumper jumps from a bridge. She is tied to a 15·m-long bungee cord and falls a total of 40·m.
(a) Calculate the effective spring constant of the bungee cord.
(b) Where will the bungee jumper experience the greatest acceleration? Choose one answer only. when he first begins to fall just before the bungee begins to stretch just after the bungee begins to stretch when the bungee is fully stretched
(c) Find the maximum acceleration of the jumper. Take upward to be the positive direction.
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You are standing at x = 8.5 km. Lightning bolt 1 at x=0 km and lightning bolt 2 at x = 13.0 km. Both flashes reach your eye at the same time. what is the time difference between the two flashes
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