Question: A 75 kg student jumps off a bridge with a 12-m-long bungee cord tied to his feet. The massless bungee cord has a spring constant

A 75 kg student jumps off a bridge with a 12-m-long bungee cord tied to his feet. The massless bungee cord has a spring constant of 430 N/m.
a. How far below the bridge is the student’s lowest point?
b. How long does it take the student to reach his lowest point?
You can assume that the bungee cord exerts no force until it begins to stretch.

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