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NEET 2021 · Energy in SHM

Energy in SHM question from NEET 2021

Q58NEET 2021Easy

Energy in SHM

A body is executing simple harmonic motion with frequency 'n', the frequency of its potential energy is:

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Answer: (c)

  1. PE=12kA2sin⁡2ωt=14kA2(1−cos⁡2ωt)PE = \frac{1}{2}kA^2\sin^2\omega t = \frac{1}{4}kA^2(1 - \cos 2\omega t)
  2. PE varies with angular frequency 2ω2\omega, so frequency 2n2n.
  3. So the answer is (c) 2n2n.
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