Author Topic: Forces on rotating disk object  (Read 1748 times)

Offline StoyanNikolov

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Forces on rotating disk object
« on: 04/29/2023 03:22 pm »
Is it convenient to ask following question. Suppose we have solid circular object and 5 different moments like in the picture:

[Please see attached Rotating.jpeg file]

In moment 1 we apply force (downwars direction) so as to start rotating the object around center of the mass (green dot) , Only rotational motion.

In moment 2-moment 4 the object is rotating around the green dot at the center of the object (center of the mass), while the center of the mass is not moving.

In moment5 we apply upward same force as force applied in moment1 but in upward direction. Will the center of mass of the circular object start moving in some direction.

In moment 5 Will there be also translational (not only rotational) motion ? Will the center of the disk start going in some direction? Thank you.

To have translational motion (not only rotational motion).

« Last Edit: 04/29/2023 03:24 pm by StoyanNikolov »

Online Hobbes-22

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Re: Forces on rotating disk object
« Reply #1 on: 04/29/2023 03:40 pm »
No, there won't be any translation, just a change in rotation.

Here's a video that shows the LM maneuvering in space (during Apollo 12) that demonstrates this:


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