Physics

Problem

The displacement of a particle varies with time according to

x = 3t + 2t^{2}

, where

x

is in metres and

t

in seconds. The acceleration of the particle at

t = 4

s is a)

8 \text{ m s}^{-2}

4 \text{ m s}^{-2}

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

16 \text{ m s}^{-2}