Mathematics

Problem

A particle moves along a straight line so that its position is

x(t)=3t^{2}-2t+1

(in metres) at time

t

seconds. Find its velocity at

t=4\,\text{s}

. a)

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

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

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

-22\,\text{m\,s}^{-1}