Problem

A particle moves along a straight line. Its position at any instant is given by

x = 32t - \frac{8t^3}{3}

where

x

is in metres and

t

in seconds. Find the acceleration of the particle at the instant when particle is at rest. a.

-16 \text{ ms}^{-2}

-32 \text{ ms}^{-2}

32 \text{ ms}^{-2}

16 \text{ ms}^{-2}