Simple harmonic motion is typified by the motion of a mass on a spring when it is
  subject to the linear elastic restoring force given by Hooke's Law.

  The motion is sinusoidal in time and demonstrates a single resonant frequency.

            Simple Harmonic Motion Equations

 The motion equation for simple harmonic motion contains a complete description
 of the motion, and other parameters of the motion can be calculated from it.

  The velocity and acceleration are given by

  The total energy for an undamped oscillator is the sum of its kinetic energy
  and potential energy which is constant at

  Or, the way we MIT grads remember learning

  it at The Old Howard burlesque theater

  in Scollay Square, Boston...circa 1953

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