DrDre said:
Considering the energy released on impact is proportionate to the mass times the velocity squared…consider that an object of 1kg traveling at the speed of light would have a the same energy released on impact as a nuclear bomb.

You’re more right than you may know.

The equation for kinetic energy is 1/2 the mass x velocity squared. Ek = ½mv2

A 1kg object hitting something at the speed of light;
1 Kg - 186,282 m\s = 17,350,491,762 joules.

That’s about the equivalent of 4 megatons. That puts it just shy of Castle Union but orders of magnitude more than Fat Man.

I agree with your posit that it would take very little to destroy something kinetically in the GFFA. Using a ship to do it would be a waste of a ship, nor would it need to be going anywhere near light speed. It’s been used and tested in the real world for decades. Our own SDI - aptly nicknamed Star Wars - had a kinetic energy weapons division. We also used kinetic weapons in Vietnam (Lazy Dog).

All that said; I don’t rail on it or care with regard to the GFFA because it’s a series of movies where I’m more than happy to suspend belief. I’m there to escape and watch my heroes battle the bad guys. If I want realistic space physics, I’ll watch 2001: A Space Odyssey (which I do, often).