Answer
$2\times 10^4\ W$
Work Step by Step
Instantaneous power is given by $p=vF$ where v is velocity and F is the force. Therefore;
$P= v (ma)$
$P= v(m(\frac{v}{t}))$
$p=\frac{mv^2}{t}$
$p=\frac{1500\ kg \times (20\ m/s)^2}{30\ s}$
$p=2\times 10^4\ W$
