The distance $s$ in feet that a thrown object will fall in $t$ seconds is given by
$$s=16t^2 + vt\;,$$
where $v$ is the initial downward velocity in feet/second. Find the initial velocity of an object that falls $80$ feet in $2$ seconds.
The distance $s$ in feet that a thrown object will fall in $t$ seconds is given by
$$s=16t^2 + vt\;,$$
where $v$ is the initial downward velocity in feet/second. Find the initial velocity of an object that falls $80$ feet in $2$ seconds.