Dale's latest activity

Yes, this is all correct. This is not correct. The CoM moves along a straight line in any case, regardless of our choice of center of...

@gen x might be referring to the instantaneous centre of rotation: https://en.wikipedia.org/wiki/Instant_centre_of_rotation The...

I'm a mechanical engineer, so I get it: I sometimes find the physicists' view of things to be pedantic. But you need to recognize that...

The center of rotation certainly can translate. Did you not see the plots that I posted? They show what it means. You can pick any point...

Because the distance between the primary and the satellite can change. And if they are not both tidally locked then the distance between...

Please be aware that personal speculation is not permitted here. There is no part of either classical electrodynamics or quantum...

But the same applies here: - For mere kinematics, any "center of revolution" is as good as another. - For dynamics, there are choices...

So yes, you are talking about the case of two or more objects orbitting one another. In that case we do not have a rigid body and the...

I think that more important than a label of rotation vs revolution you should focus on rigid vs non-rigid motion. Rigid motion can be...

You can ask “which center of rotation makes my analysis easiest”.

The point is to show that any point can be chosen as the center, if desired. You have freedom to choose the center. You misunderstand...

Here a more recent and accurate answer by the same poster, already quoted in this thread: It's not about being relative in the sense...

We choose to decompose the motion into rotation around CM and translation of CM because it makes the math simpler. You can decompose the...

To support this see the plots I posted below

You can define it either way. Whatever is more convenient. "Center of rotation" is ambiguous, even if the frame of reference is given...