Step 3: Trying to Keep Things Constant
As with all good experiments, there should only be one independant variable. I want that variable to be the vehicle. In order to keep all of the other variables constant, I will be using each vehicle at top speed (not counting the car, which will be going at the speed limit). So that I don't get tired I'll take a ten minute break between each run. Any run that is interupted will be redone later.
Hopefully this will keep the results accurate.