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Consider a bungee jumper dropping vertically in freefall from a bridge 80 m above the ground....

Consider a bungee jumper dropping vertically in freefall from a bridge 80 m above the ground. After three seconds, the elastic cord connecting the jumper to the bridge starts to stretch, which changes the jumper's acceleration to 15 m/s2 upwards.

a) Sketch (without doing any math) the position vs time, velocity vs. time, and acceleration vs. time graphs for the bungee jumper from the moment they start to fall to the moment they reach the closest to the ground.

b) How long is the bungee cord when unstretched? (That is, how far had the jumper fallen when the cord began to stretch?)

c) How fast was the jumper travelling when the cord began to stretch?

d) How close to the ground do they reach during the jump?

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