Problem: Your adventurous friend Lola goes bungee jumping. She leaps from a bridge that is 100 m above a river. Her bungee cord has an un-stretched length of 50 m. Lola has a mass of 48 kg. (i) How fast is she falling when she just starts to stretch the cord?(ii) How long does it take for Lola to reach this point?

FREE Expert Solution

Uniform accelerated motion (UAM) equations:

 vf = v0 -gty= (vf+v02)ty= v0t-12gt2 vf2= v02 -2gy

We'll use kinematics for this part:

  • v0 = 0 m/s
  • g = 9.8 m/s2 
  • Δy = - 50 m (length of unstretched bungee cord, The coordinate has the origin at the jumping point)
  • vf = ?
  • t = ?
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Problem Details

Your adventurous friend Lola goes bungee jumping. She leaps from a bridge that is 100 m above a river. Her bungee cord has an un-stretched length of 50 m. Lola has a mass of 48 kg. 

(i) How fast is she falling when she just starts to stretch the cord?

(ii) How long does it take for Lola to reach this point?

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