E = MC squared.
When a car is moving downhill, with the energy is gains because of it’s mass, I bet its relative weight becomes magnified, multiplied by some number. Like TNT with a lit fuse.
My daughter launched a car in these Pennsylvania hills, speeding down a hill. Every window blown out, all air bags deployed. By some miracle, she didn’t have a scratch. She was sitting in an ambulance, in shock, about 18 years old. I couldn’t believe there wasn’t a broken bone. Thank god.
But these hills, with a car, dangerous as hell if you speed. One bounce, the wheels are in the air, and thats it. A runaway train with no steering.
p=mv.
Big mo.