$[-/4$ Points$]$

$$ SCALCCCS $2\mathrm{.}6\mathrm{.}016.$

The displacement $($in meters$)$ of a particle moving in a straight line is given by the equation of motion $s=\frac{1}{t^2},$ where $t$ is measured in seconds. Find the velocity of the particle at times $t=a,t=1,t=2,$ and $t=3.$

$t=a,v=$

$t=1,v=\frac{}{s}$

$t=2,v=\frac{m}{s}$

$t=3,v=,\frac{m}{s}$

$\frac{m}{s}$