Chapter 4 280 Energy Methods for Particles Design Problems Design Problem 4.1 In

Question

Chapter 4 280 Energy Methods for Particles Design Problems Design Problem 4.1 In practice, during a jump, bungee cords stretch to two to four times their length, and a jumper feels no more than 2.5-3.5g of acceleration. Assume the force the bungee cord has the mathematical form k8-83, where k and is the amount of stretch in the cord past its unstretched length. Design a cord (that design the constants k and ) so that the bungee cord stretches 2.5 times its length, the acceleration of the jumper does not exceed 3g. and the bungee cord has zer stiffness at the bottom of a 400 ft drop. unstretched in are constants and is, unstretched bungee cord 400 ft bungee jumper Figure DP4.1

Explanation / Answer

Solution :-

let unstreched length be l and and spring constant be k hence 2.5l+l =400 hence l =114.29 ft and k*(400-114.29) =m(3g+g) g =32.2 ft/s^2 you have to provide jumper's mass to solve this question

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