We can make it the forward direction is positive, since acceleration is in the opposite direction of forvard if is slowing down.
Find the antiderivative, which is velocity
At this point
Find the antiderivative, which is the position
If we let the position at time t=0 be the 0 position, then C=0
When the position is 200 ft, we have
When the velosity is 0 we have
Set the two equal to each other and solve for t.
We use the positive number, t=5 s
(the time it took to come to a stop)
Plug into one of the expressions we have for
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