Hi everyone, this is the attempted problem.
A car starts from rest and accelerates at 5m/s^2 for 15 seconds. It than decelerates at -2m/s^2 for an unknown time (say t').
Calculate how long it takes for the car to stop
I know I should be used, the constant equations of acceleration. E.g Integrate v = u + at but after this I get confused
The Attempt at a Solution
Initial velocity is 0, and velocity after 15 seconds is 75m/s.
Now after this where can I go?