The discussion revolves around the forces acting on a rotating disk object, specifically examining the effects of applied forces at different moments in time. Participants explore the implications of these forces on both rotational and translational motion, considering scenarios in a vacuum without gravitational influences.
The discussion remains unresolved, with multiple competing views on whether translational motion will occur in moment 5 and the conditions necessary for such motion. Participants do not reach a consensus on the implications of the applied forces and their effects on the disk's motion.
Participants note the importance of defining the nature of the applied forces and the initial conditions, as these factors significantly influence the outcome of the scenario. There is also mention of the need to clarify the role of impulse forces and their practical implications.
- The center of mass is initially at restA.T. said:- Is the center of mass initially at rest?
- Is the force a short impulse or does it act over a certain period? If the latter, is the direction of the force constant in the inertial frame or in the rotating disk frame?
- Are there any other forces acting?
If there are no other forces, and it is a short impulse, the center of mass will accelerate in the direction of the force. So if it was initially at rest, that's where it will go.
Thank you.Drakkith said:Assuming other forces are either absent or negligible, it will move upwards.
Consider the situation in which the disk isn't rotating, but a fast moving object moves upwards and strikes the disk at the point you've circled (or some pegs sticking out, or however you want to apply the force). Assuming the disk is not attached to anything else, the center of mass will move upwards. This is the same situation, just without the rotation, which I don't believe matters at all for your question.
Everyone here is in agreement. If an object that is not translating is subject to an net upward external impulse, it will begin translating upward.StoyanNikolov said:If others also want to give opinion are welcome.
Um, telling other people what they are and are not welcome to do is more likely to make them angry than anything else.StoyanNikolov said:If others also want to give opinion are welcome.
No. It is polite invitation. If you consider yourself angry , pleaseVanadium 50 said:Um, telling other people what they are and are not welcome to do is more likely to make them angry than anything else.
Further, when discussing rotation, it is not a good idea to use the word "moment" to mean an instant in time.
Now,, I count this question being answered no fewer than 8 times - including in a link you yourself provided. If 7 is not enough, how many more? 15? 32? 64?
Telling people not to post on "your" topic is not OK.StoyanNikolov said:please
don't post on this topic.
Thread will remain locked. Any questions, concerns, or comments about this can be directed towards myself or another mentor via a personal message or the report button.russ_watters said:Locked pending more moderation. Don't hold your breath.