Physics

Problem

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

x = 0.12\,\text{m}\,\cos(8\pi t)

, where

t

is in seconds. What is the smallest positive time at which the velocity of the glider is zero? a)

0.063\,\text{s}

0.250\,\text{s}

0.125\,\text{s}

0.040\,\text{s}