Timeline for Conservation of angular momentum - linear velocity
Current License: CC BY-SA 4.0
Post Revisions
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 26, 2020 at 9:50 | vote | accept | user5539357 | ||
| Jan 26, 2020 at 9:45 | comment | added | user5539357 | Yes, that's what I mean. | |
| Jan 26, 2020 at 9:43 | comment | added | my2cts | Constrained motion means that the particle is held in circular orbit by an external force. | |
| Jan 26, 2020 at 8:30 | comment | added | user5539357 | @my2cts could you explain the difference? Constrained circular motion means the particle orbits without a centripetal force? | |
| Jan 26, 2020 at 7:38 | answer | added | user249968 | timeline score: 3 | |
| Jan 25, 2020 at 22:40 | comment | added | my2cts | I am unsure if you are thinking of a particle in constrained circular motion or of a free particle instead - as you imply that there is no external force. | |
| Jan 25, 2020 at 22:06 | comment | added | user5539357 | Ok, does the velocity and therefore kinetic energy of the particle increase because when the radius is being reduced the velocity is not perpendicular to the force vector and it causes a change in the velocity of particle? | |
| Jan 25, 2020 at 22:00 | answer | added | MarkP | timeline score: 0 | |
| Jan 25, 2020 at 21:27 | history | edited | Qmechanic♦ |
edited tags
|
|
| Jan 25, 2020 at 21:26 | comment | added | user5539357 | It spirals inwards, I guess its kinetic energy has to increase, and it explains why its linear velocity eventually doubles, but I don't really see why it changes because of spiraling. | |
| Jan 25, 2020 at 21:12 | comment | added | Bill N | Circular motion requires a force directed toward the center, $F_c=mr\omega^2$. Also, think about the direction the particle moves as it is changing $r$ and whether work is done on the particle. Does the kinetic energy of the particle increase? | |
| Jan 25, 2020 at 21:09 | comment | added | user5539357 | To maintain? I guess zero. To reduce the radius I have to apply a force that is perpendicular to the velocity vector, and it doesn't have to be an external force. | |
| Jan 25, 2020 at 20:14 | comment | added | Bill N | Think about this: How much force is needed to maintain the original circular motion? Then, how do you reduce the radius to 0.5? | |
| Jan 25, 2020 at 20:00 | history | asked | user5539357 | CC BY-SA 4.0 |