Use the position function

s$($t$)=16$t$2+$ v$0$t $+$ s$0$

for free$-$falling objects.

A block is dropped from the top of an $850-$foot platform. What is its velocity, in feet per second, after $3$ seconds?

ft$/$s

What is its velocity, in feet per second, after $7$ seconds?

ft$/$s