Net Work & Kinetic Energy Video Lessons

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# Problem: Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle as shown in the figure . He falls for 15 m before the bungee cord begins to stretch. Chriss mass is 75 kg and we assume the cord obeys Hookes law, F = - k x, with exttip{k}{k} = 55 N/m .If we neglect air resistance, estimate how far below the bridge Chriss foot will be before coming to a stop. Ignore the mass of the cord (not realistic, however) and treat Chris as a particle.

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###### Problem Details

Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle as shown in the figure . He falls for 15 m before the bungee cord begins to stretch. Chriss mass is 75 kg and we assume the cord obeys Hookes law, F = - k x, with = 55 N/m .

If we neglect air resistance, estimate how far below the bridge Chriss foot will be before coming to a stop. Ignore the mass of the cord (not realistic, however) and treat Chris as a particle.