Physics

Problem

The displacement of a particle executing simple harmonic motion is given by

x=0.02\cos(100\pi t+\tfrac{\pi}{3})\,\text{m}

. Calculate its velocity at

t=0.010\,\text{s}

. a) +6.3\,\text{m}\,\text{s}^{-1} b) -5.4\,\text{m}\,\text{s}^{-1} c) +5.4\,\text{m}\,\text{s}^{-1} d) +3.1\,\text{m}\,\text{s}^{-1}