hello, i'm having trouble with kinematic equations. i feel that i understand them, but when i get to a problem, i'm so confused. i can figure out what i have and what i don't have, but it's choosing the correct formula that is my main problem. how do i know when to solve for what? for example, i'm given speed of 25 m/s [acceleration is constant] and i know that the object comes to rest after 34 seconds and now i am asked to solve for distance initial speed=25 m/s, final speed=0, time=34 s. would i use x=1/2(final velocity + initial velocity)t?