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  3. a bungee cord is 30.0 m long and, when stretched a

A bungee cord is 30.0 m long and, when stretched a distance x, it exerts a...

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Physics

A bungee cord is 30.0 m long and, when stretched a distance x,it exerts a restoring force of magnitude kx. Your father-in-law(mass 93.0 kg ) stands on a platform 45.0 m above the ground, andone end of the cord is tied securely to his ankle and the other endto the platform. You have promised him that when he steps off theplatform he will fall a maximum distance of only 41.0 m before thecord stops him. You had several bungee cords to select from, andyou tested them by stretching them out, tying one end to a tree,and pulling on the other end with a force of 420 N .

When you do this, what distance will the bungee cord that youshould select have stretched?

Answer & Explanation Solved by verified expert
3.5 Ratings (647 Votes)
Solve this problem using work energy theorem Wext K U Eth In the above expression Wext is the work done by external forces on a system K is the change in kinetic energy of objects in the system U is the change in potential energy due to conservative forces within the system and Eth is the change in thermal energy due to nonconservative forces within the system So we need to choose a    See Answer
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