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The jumper mass is 90kg

The unstretched length of the rope is 15m(of neglible mass) but the bungee operator can change this at a rate of +/- 0.5ms at any time

It extends by 1% for every 12N if tension force. The drag force is 0.3v^2.

What I really want to do is calculate how far the rope has stretched in 0.02s. Is there any way of using time with Hooke's law?

Any help would be greatly appreciated.

Michael