Derive the expression of the mechanical energy for under damped system
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The expression of the mechanical energy for under damped system is
Explanation:
The mechanical energy of simple harmonic motion is
Now if the amplitude of oscillation is , then the mechanical energy of the oscillator obtain
The mechanical energy of simple harmonic motion at a time is
Hence, the expression of the mechanical energy for under damped system is
Note: mechanical energy is not constant but decreases exponentially with time.
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