Problem Several students are riding in bumper cars at an amusement park. The mass of car A and its occupants is 250kg. The combined mass of car B and its occupants is 200kg. Car A is 15m away away from car B and moving to the right at 2.0m/s, as shown, when the driver decides to bump into car B, which is at rest. (A) Car A accelerates at 1.5m/s2 to a speed of 5.0m/s and then continues at a constant velocity until it strikes car B. Calculate time for car A to travel the 15m. Attmept I assumed that you would use v=d/t until I realized that velocity isn't constant. So I looked to the kinematic equations, and thought i would use d=vi*t+1/2*a*t2 until i noticed that acceleration isn't constant either. I'm going into AP Physics B after I took Honors Physics last year. I've never had to work with non constant acceleration before and I don't know what to do with it. I've looked online and never found anything relevant to what I need. I don't want an answer to the question, I just need to know what I use to get to the answer.