Mathematics

Problem

The position of a particle moving along a straight line is given by

x(t)=3t^{2}+2t+4\;\text{m}

, where

t

is in seconds. Find its instantaneous velocity at

t=2\,\text{s}

. a)

12\,\text{m}\,\text{s}^{-1}

18\,\text{m}\,\text{s}^{-1}

14\,\text{m}\,\text{s}^{-1}

10\,\text{m}\,\text{s}^{-1}