In any collision, momentum is conserved. Momentum is also directional, so it "cancels" in a head-on crash. Also, cars can be assumed to have equal mass, so:
Momentum change (per body) = mass*relative speed/number of bodies
Actually, this wouldn't be too terribly inefficient, it's just that they're only really useful for pumping or extracting energy from water. They're not too good with gasses, for reasons i'll not delve into here (the gas would have to be moving under insane pressure,speed). OTOH, conventional turb...
Here comes the math.
In any collision, momentum is conserved. Momentum is also directional, so it "cancels" in a head-on crash. Also, cars can be assumed to have equal mass, so:
Momentum change (per body) = mass*relative speed/number of bodies
Total momentum change in this test:
120*mass o...