Consider a 1D under-damped harmonic oscillator with an equilibrium point at x = 0. If the oscillator is moving from its maximum positive displacement towards its equilibrium point, when does the oscillator reach its maximum velocity (think about free body diagrams here…)?

 

A. When x = 0.

 

B. Sometime right before x = 0.

 

C. Sometime right after x = 0.

 

D. This is a trick question because