I summarized it above, there’s an extra rotation included when the outer circle moves along the inner circle, essentially falling a bit with every roll forward. If the outer circle rolled along a straight line of the same length as the circumference of the inner circle, it would only roll 3 times, but moving around the circle instead adds exactly one extra rotation. That other gent says this is used in calculating orbits too, where you’re also moving forward while constantly falling
I read an article about it. Everybody is doing a shit job of describing what happens. The outer circle naturally makes a full rotation as it travels around the inner one, as the path it follows goes around a full 360°, so that counts as one of the rotations it ends up making, which is in addition to the 3 due to travel around the circumference.
SpaceNoodle@lemmy.world 2 years ago
This should have been an article. What’s the summary?
protist@mander.xyz 2 years ago
I summarized it above, there’s an extra rotation included when the outer circle moves along the inner circle, essentially falling a bit with every roll forward. If the outer circle rolled along a straight line of the same length as the circumference of the inner circle, it would only roll 3 times, but moving around the circle instead adds exactly one extra rotation. That other gent says this is used in calculating orbits too, where you’re also moving forward while constantly falling
SpaceNoodle@lemmy.world 2 years ago
I read an article about it. Everybody is doing a shit job of describing what happens. The outer circle naturally makes a full rotation as it travels around the inner one, as the path it follows goes around a full 360°, so that counts as one of the rotations it ends up making, which is in addition to the 3 due to travel around the circumference.
OmnislashIsACloudApp@lemmy.world 1 year ago
thank you, that was the comment that explained it for me
schmidtster@lemmy.world 2 years ago
Add the radius together. If the circle is inside. A-B 3-1 = 2.
protist@mander.xyz 2 years ago
Does not compute
schmidtster@lemmy.world 2 years ago
It’s in the video.
SpaceNoodle@lemmy.world 2 years ago
schmidtster@lemmy.world 2 years ago
…?