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Work, Power and Energy: JEE — Spring-Block Period and Energy MCQ

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JEE — Spring-Block Period and EnergyHardQuestion 30467

Question

A block-spring system oscillates. At equilibrium position, the PE is minimum and KE is maximum. If amplitude is A, the maximum KE is:
  1. A
    kA²
  2. B
    ½kA²
    Correct
  3. C
    kA²/4
  4. D
    2kA²

Correct answer

½kA²

Explanation

At equilibrium, all energy is kinetic: KE_max = Total energy = ½kA².

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