Ballistic Ping Pong Ball vs. Tennis Ball at 450km/h!

Just thought that as a 'Physics Girl' you'd do some research on the actual physics of the crash...Crashing into a semi going 80kph and going backwards at 76kph would be traumatic, but wouldn't feel like hitting a wall at 156kph. The energy goes with the square of velocity, so when you're going twice the speed you have 4times the energy (as you've actually said in the video...). In that case your total energy change would be pretty much double of your initial energy, which results in a speed change equivalent to approx. 113kph into the wall. It's a common misconception, where people say hitting someone on a highway head on at 60mph is an equivalent to 120mph into the wall...here's what it would really look like:


https://www.youtube.com/watch?v=R7dG9UlzeFM