Mathematics

Problem

For a body moving along a straight line, the position at time

t

seconds is

s(t)=t^{3}-6t^{2}+9t+4

metres. Calculate its acceleration at

t=2

seconds. a)

-12\text{ m/s}^{2}

12\text{ m/s}^{2}

0\text{ m/s}^{2}

6\text{ m/s}^{2}