Timeline for How does a rigid body constiting of two particles rotate?
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Apr 25, 2018 at 20:01 | answer | added | John Alexiou | timeline score: 0 | |
| Apr 25, 2018 at 14:49 | comment | added | John Alexiou | The rods can impart torques as well as forces on the masses. | |
| Apr 24, 2018 at 17:48 | answer | added | cms | timeline score: 0 | |
| Apr 24, 2018 at 16:41 | comment | added | John Alexiou | Do the sum of forces and moments at the center of mass. Then you can see where to body will rotate about. | |
| Apr 24, 2018 at 16:30 | answer | added | Involute | timeline score: 1 | |
| Apr 24, 2018 at 12:16 | answer | added | Anurag Baundwal | timeline score: 0 | |
| Apr 24, 2018 at 8:39 | answer | added | sammy gerbil | timeline score: 0 | |
| Apr 22, 2018 at 10:01 | comment | added | katana_0 | @Steeven OK Suppose you have a masseless rod $\ell$ joining two masses $m_1, m_2$. Also, the through the middle of rod $O$ passes an axle, through which the rod can rotate freely. now i don't understand if you push $m_1$ in a line perpendicular to the rod, then why would $m_2$ move ? The only force which acts on $m_2$ is the tension, but the tension is directed towards $O$ (radially in $\ell$), but not perpendicular (i.e it has no tangential component) to it ! | |
| Apr 21, 2018 at 17:21 | comment | added | Steeven | I'm not sure I understand the example you describe. If the two pencils where not connected by a third rod, would they then not both rotation as always? Would only one rotate? If that is the case, then only one pencil is connected to the torque axle. With 180 degrees between them and a third rod connecting them, the other pencil will only move when the first is moving slightly further than exactly 180 degrees. Only then will any tangential force be propagated to the other pencil. Only then will it move. This is what infinite forces means - it is impossible at exactly 180 degrees | |
| Apr 21, 2018 at 16:20 | answer | added | Endy | timeline score: 0 | |
| Apr 21, 2018 at 14:00 | history | edited | katana_0 | CC BY-SA 3.0 |
added 153 characters in body
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| Apr 21, 2018 at 13:54 | comment | added | katana_0 | @Steeven I can make a makeshift device simulating with pencils as massless rods and clay lumps as masses within one minute but it clearly rotates even when $\phi \rightarrow 180$ So if "it's impossible" then how does it's possible to have such rotation in real life XD ? | |
| Apr 21, 2018 at 12:14 | comment | added | Steeven | Requiring infinite force is usually the same as saying "it's impossible", yes. | |
| Apr 21, 2018 at 11:22 | history | asked | katana_0 | CC BY-SA 3.0 |