Just looking over some extra physics questions and I came upon this one, it seems quite easy, but difficult when i actually attempted it: Just as a traffic light turns green, a waiting car starts off with a constant acceleration of 6.00m/s^2. At the instant the car begins to accelerate, a truck with a constant velocity of 21.0m/s passes in the next lane. How far will the car travel before it overtakes the truck? How fast will the car be travelling when it overtakes the truck? I attempted this question by changing the car's acceleration to a velocity by multiplying with an amount of time, etc. I imagine that this question could possibly be done with trial and error,but i'm just wondering if there's a quicker way to attempt this question or a specific formula. Any hints or pointers, plz post!