2 ms·
They do! Gravity is an r-squared law. (If you're confused about constant acceleration due to gravity, Galileo's experiment and all that, well different masses
by rm445 7y ago
They do! Gravity is an r-squared law.
(If you're confused about constant acceleration due to gravity, Galileo's experiment and all that, well different masses fall to earth with the same acceleration from the same height, but g decreases with distance from the Earth. It takes the familiar 9.81 m/s value as an agreed averaged value at the surface).
- sp332 7y agoI know they do in real life. It's the illustrations showing a static curve that the masses slide over that I'm taking issue with.
- rm445 7y agoOh yeah, I see what you mean. I think the models in the article are deliberately simplified. At least some of those plots demonstrate a constant force, rather than a gravitational-type force. And the well-known weights-on-a-rubber-sheet analogy is notoriously unhelpful. I guess the real equations work for real curved spacetime.