I just solved for the time when a car comes to a stop. I have two times. Which one do I use and why?

Question

I just solved for the time when  a car comes to a stop. I have two times. Which one do I use and why?

kkutie7 · Answer

so I solved where velocity=0

anonymous · Answer

two times how?? not understanding what u want to ask

anonymous · Answer

v= 0 at  t=0

kkutie7 · Answer

no that's not true...
for my problem a car is stopping at the stop light I know the velocity I know how long it takes it to stop. I solved where v=0 so the stopping point and another thing along the journey considering the position vs time is a parabola. I have two times because v= twice. I don't understand which one to use I have a large one and a small one.

anonymous · Answer

can you post the original problem so that we can understand your inquiry much better? thanks...

aaronq · Answer

When i solved for time i got -7 seconds and positive 7 seconds. Are those the values you got aswell?