# The displacement x of a particle at the instant when its velocity is v is given by $v = \sqrt {3x+16}$ . Its acceleration and initial velocity are
$\begin{array}{1 1} 1.5\;units,4\;units \\ 3\;units,4\;units \\16\;units,1.6\;units \\16 \;units, 3\;units \end{array}$