# The x and y coordinates of the particle at any time are $x= 5t - 2t^2$ and $y = 10t$ respectivelv, where r and y are in meters and t in seconds. The acceleration of the particle at $t = 2s$ is
$\begin{array}{1 1} (1) 0 \\ (2) 5 m/s^2 \\ (3) -4\;m/s^2 \\ (4) -8 m/s^2 \end{array}$