I want to mount some type of measuring device on a remote control car, and then crash it into a wall. As a result of the impact, I want to look at the speed the car was traveling at point of impact, as well as the rate of decelleration that occured after impact (using various bumpers). I think this is similar to how car manufacturers and vehicle safety agencies test cars for safety, but on a much smaller scale. I'm hoping someone can at least provide me with the appropriate key words to search the internet with, so that I can study and understand the forces involved. I would also like to find websites where someone has done something similar to this, and also to hopefully find a ready-made product that I can attach to the toy car. However, I don't really know what I'm looking for well enough to do a proper search. Any advice is appreciated, as I'm a physics rookie.