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- I have a question. I have a rotating tube like a line that has two end and one of them is the center of rotation (like a watch arrow just tube), and inside the tube a mass that is moving towards the center of rotation...

Dear People,

I have a question. I have a rotating tube like a line that has two end and one of them is the center of rotation (like a watch arrow just tube), and inside the tube a mass that is moving towards the center of rotation. So the masses moving along the line aka along the length of the tube. Both starts to move from the same distance from the center of rotation and has the same rotational velocity. Now I have 2 case:

1, the mass moves inwards to the center of rotation slower

2, the mass moves inwards to the center of rotation faster

Both cases the initial angular velocity is the same. Both of them reaches a specific distance which is the same in both case but of course it takes different times. So is that true that the angular velocity of the system would be the same when the mass reaches the destination which is the same for both cases. So it would not matter how fast they move inwards towards the center the final velocities would be the same at the destination? I mean this is how the kinetic energy preservation aka angular momentum conservation would work right?

Thank you!

I have a question. I have a rotating tube like a line that has two end and one of them is the center of rotation (like a watch arrow just tube), and inside the tube a mass that is moving towards the center of rotation. So the masses moving along the line aka along the length of the tube. Both starts to move from the same distance from the center of rotation and has the same rotational velocity. Now I have 2 case:

1, the mass moves inwards to the center of rotation slower

2, the mass moves inwards to the center of rotation faster

Both cases the initial angular velocity is the same. Both of them reaches a specific distance which is the same in both case but of course it takes different times. So is that true that the angular velocity of the system would be the same when the mass reaches the destination which is the same for both cases. So it would not matter how fast they move inwards towards the center the final velocities would be the same at the destination? I mean this is how the kinetic energy preservation aka angular momentum conservation would work right?

Thank you!