A tall bald student (height 2.1 meters and mass 102.3 kg) decides to try bungee

Question

A tall bald student (height 2.1 meters and mass 102.3 kg) decides to try bungee jumping from a bridge. The bridge is 36.7 meters above the river and the "bungee" is 25.3 meters long as measured from the attachment at the bridge to the foot of jumper. Treat the "bungee" as an ideal spring and the student as a 2.1-meter rod with all the mass at the midpoint. This particular student desires to stay dry. What is the minimum spring constant (N/m) of the "bungee" that will allow the student to get as close as possible to the water but still stay dry? Assume that he begins at a standing position and "falls" from the bridge.

Explanation / Answer

ans:- 843.33 N-m

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