A bungee cord that behaves linearly elastically has an u
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A bungee cord that behaves linearly elastically has an unstressed length L0 760 mm and a stiffness k 140 N/m. The cord i
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A bungee cord that behaves linearly elastically has an unstressed length L0 760 mm and a stiffness k 140 N/m. The cord is attached to two pegs, distance b 380 mm apart, and pulled at its midpoint by a force P 80 N (see figure). (a) How much strain energy U is stored in the cord? (b) What is the displacement dC of the point where the load is applied? (c) Compare the strain energy U with the quantity PdC/2. (Note: The elongation of the cord is not small compared to its original length.)
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