This is good footage of a cat twisting to land right side up, but I’m still unclear on how it’s conserving momentum. It really does look like it can bring its rear end around without twisting anything else in the opposite direction. Obviously, (and against what the veterinarian in my church group says), that’s impossible without something to push on. (Her: “It can push on itself internally.” What???)
Can someone explain to a physical science teacher how this is really working? How are the parts of the cat in the video offsetting their momentums and keeping the same inertia until it touches the ground? In one of the shots, I see the tail twirling conspicuously. Is that what’s offsetting the other movement? It has the advantage of being much further from the center of rotation, giving it more angular momentum.