1. The problem statement, all variables and given/known data Prove that 2 motorized toy cars have a constant velocity. A car was set up at a marked spot, then turned on and left to go for 3m. This was done three separate times and was timed using 2 timers (2 people). how can i prove a constant velocity? I have the averages for both times given and I have averaged out how long it took for the car to go 1m. What type of graph should I used to prove a constant velocity? How do I prove a constant velocity? Position v. Time or Velocity v. Time graph?