Everyone's heard of immovable rods. They're a staple of fantasy tabletop rpgs. But recently, I started thinking as to how one would actually work. Theoretically, it would just be an object able to absorb whatever forces get thrown at it without budging. I haven't taken a physics class since high school, but I vaguely remember something about how the more mass an object has, the less it moves around when something else punches into it. So would an object with infinite mass not move at all when a force is exerted upon it?
- It is rod shaped. I don't think this matters but let's say it's a foot long and an inch in diameter.
- It has infinite mass.
- Obviously something with infinite mass would be so deep in a gravity well that it would collapse into a black hole and probably suck up the entire planet and destroy everything, so let's say that doesn't happen, because magic.
- Let's assume that the rod is localized, so that when you turn it on, it doesn't fly off into the distance as the planet moves away from it while it remains at the same static point in the planet's orbit. The rod moves with the planet as it rotates and orbits around the sun. Same with the rotation of the galaxy the planet is in, and other things of that nature.