Question

Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle, (Figure 1). He falls for 15 m before the bungee cord begins to stretch. Chris's mass is 78 kg and we assume the cord obeys Hooke's law, F=−kx, with 50 N/m . if we neglect air resistance , estimate what distance d below the bridge chris's foot will be before coming to a stop. ignore the mass of the cord and treat chris as a particle.

Answer 1

Concept - here we use work energy theorem for which work done by the spring and gravity is equal to change in kinetic energy.

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