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Barron's 2nd Edition DT Q37

  • Writer: keshprad
    keshprad
  • Dec 13, 2019
  • 1 min read

Updated: Feb 13, 2020


37) This question asks us to find out the factor at which u need to stretch a spring to quadruple its initial potential energy. Let’s first make an original relation.

ree
Where U is potential energy, k is spring constant, and x is spring displacement

Now, we need to look at how the spring stretches in order for the potential energy to quadruple.

ree
Where U is potential energy, k is spring constant, and x is spring displacement

Answer: A

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