A few problems in physics class today reminded me of my days working at the General Motors proving grounds in Michigan. I was running mock Cadillac cars with new v8 engines over the Belgian block tracks and recording stresses in the newly designed engine brackets, on which I had placed 83 strain gages onto, after stress coating to know where the sensitive points were.
The car crash problem in physics is simple math, but useful in studying and designing for impact crashes. The video below is a crash test. Keep in mind, lots of work precedes this kind of expensive test. Including computer modeling of everything possible.