A 783kg bungee jumper is enjoying an afternoon of jumps the, Ask an Expert

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A 78.3?kg bungee jumper is enjoying an afternoon of jumps. The jumper's first oscillation has an amplitude of 10.3m and a period of 4.75s. Treating the bungee cord as a spring with no damping, calculate each of the following:

a) the spring constant of the bungee cord,

b) the bungee jumper's maximum speed during the oscillation,

c) the time for the amplitude to decrease to 2.17m (with air resistance providing the damping of the oscillations at 7.17kg/s).

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