# Homework Help: Velocity of the bungee jumper

1. Apr 16, 2006

### tink123

Lola goes bungee jumping. She leaps from a bridge that is 100 m above a river. Her bungee cord has an unstretched length of 50 m and a spring constant k=700N/m. lola has a mass of 45 kg. How fast is she falling when she just starts to stretch the cord? How long does it take for Lola to reach this point.

I used the equation V=√(k/m)(A)^2 and I got

V=√(700N/m/45kg)(50m)^2)=197.20m/s

I was wondering If I used the right equation b/c the answer seems awfully high.

The second part of the question i don't know which equation to use.
Thanks

2. Apr 16, 2006

### durt

Just ignore the spring, because it is not being stretched yet. She's just plain old falling.

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