Physics

Problem

For a simple harmonic oscillator whose displacement from equilibrium is modeled by

x = A\cos(\omega t)

, which of the following expressions best represents its velocity as a function of time? a)

v(t)=A\omega\sin(\omega t)

v(t)=-2A\omega\sin(\omega t)

v(t)=-A\omega\sin(\omega t)

v(t)=-A\omega\cos(\omega t)