Imagine swinging a rock over your head in a circle, on a string. Add more energy, and the rock speeds up. Now replace the string w a bungee cord. Add more energy, and the cord stretches / the rock moves further out. The energy is stored in cord. Gravity is that bungee cord.https://twitter.com/robkroese/status/1048712341527953409 …
-
Show this thread
-
2/ Analogy isn't perfect, bc the dF/dz for gravity has a downward slope, but the dF/dz for a bungee cord INCREASES, but it's a hand-waving way to see that the energy is soaked up by increasing the radius, not the velocity
1 reply 0 retweets 9 likesShow this thread -
3/ Here's yet another way to look at it. Picture that big funnel with a steel ball bearing you see at science museums. Release the ball on a tangential path. It circles the funnel, WAYYY out at the lip, slowly, slowly. Yes? That ball has a LOT of potential energy right now. >
1 reply 0 retweets 2 likesShow this thread -
This Tweet is unavailable.
-
-
This Tweet is unavailable.
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.