An elastic cord is 65 cm long when a weight of 75 N hangs

Chapter 5, Problem 2P

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QUESTION:

Problem 2P

An elastic cord is 65 cm long when a weight of 75 N hangs from it but is 85 cm long when a weight of 180 N hangs from it. What is the “spring” constant k of this elastic cord?

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QUESTION:

Problem 2P

An elastic cord is 65 cm long when a weight of 75 N hangs from it but is 85 cm long when a weight of 180 N hangs from it. What is the “spring” constant k of this elastic cord?

ANSWER:

SolutionStep 1 a) First, we have to list out the variables provided. They are, The electrical energy as output, EElectrical0 J The efficiency of the device, = 60 % or 0.6 The chemical energy as input, E ChemicalHere, we have to find out the amount of chemical energy as input.

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