The equation of motion of a damped harmonic oscillator subject to a damping force $-bv$ is:

1. A $m\ddot x = -kx$
2. B $m\ddot x = -kx - b\dot x$ Correct answer
3. C $m\ddot x = +kx$
4. D $m\ddot x = F_{ext}$

Solution

Newton's law with spring + damping forces: $m\ddot x + b\dot x + kx = 0$.

About this question

Subject: Physics · Chapter: Oscillations · Topic: Damped and Forced Oscillations

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