Timeline for Does a body always rotate purely about its center of mass? [duplicate]
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Aug 19, 2015 at 5:35 | history | closed |
John Alexiou ACuriousMind♦ Kyle Kanos John Rennie newtonian-mechanics Users with the newtonian-mechanics badge or a synonym can single-handedly close newtonian-mechanics questions as duplicates and reopen them as needed. |
Duplicate of Do objects rotate around the torque vector or its center? | |
Aug 18, 2015 at 18:32 | vote | accept | Tripti Khulbe | ||
Aug 18, 2015 at 17:54 | answer | added | CR Drost | timeline score: 1 | |
Aug 18, 2015 at 15:25 | comment | added | Gert | This question is poorly defined. What does "smooth" mean here? Frictionless or not? A body does not always rotate about it's centre of mass. Imagine a uniform horizontal bar attached firmly at a third of its length to a vertical bar, which is made to rotate on its vertical centre line. The horizontal bar will obviously not rotate on its centre of gravity. | |
Aug 18, 2015 at 15:14 | comment | added | Tripti Khulbe | Moreover the center of mass would be having curvilinear motion | |
Aug 18, 2015 at 15:13 | answer | added | John Alexiou | timeline score: 3 | |
Aug 18, 2015 at 15:11 | comment | added | Tripti Khulbe | @ja72 The link that you have provided later has the same situation but different question. My basic question is whether a body always rotate PURELY about its centre of mass or not. This is just an example if somebody could prove the above question using this example. | |
Aug 18, 2015 at 15:05 | comment | added | Tripti Khulbe | The net forces are obviously not zero. The other end of the rod moves along the ground . The weight mg and the normal reaction forces act. | |
Aug 18, 2015 at 14:59 | comment | added | Ernie | If the rod is standing vertical to a smooth horizontal ground, how does it get velocity and acceleration when you release it? It's just standing there, right? I don't understand the image. | |
Aug 18, 2015 at 14:35 | review | Close votes | |||
Aug 19, 2015 at 5:35 | |||||
Aug 18, 2015 at 14:29 | comment | added | John Alexiou | Is this physics.stackexchange.com/a/102150/392 describes the situation, or are you talking in general? | |
Aug 18, 2015 at 14:26 | comment | added | John Alexiou | The answer is not. If net forces are zero then the only motion possible is for the center of mass to move on straight line. Is the bottom of the rod in contact still, or is it in free fall? | |
Aug 18, 2015 at 14:23 | comment | added | Tripti Khulbe | The question is different. | |
Aug 18, 2015 at 14:20 | history | edited | Tripti Khulbe | CC BY-SA 3.0 |
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Aug 18, 2015 at 14:17 | comment | added | John Alexiou | possible duplicate of Do objects rotate around the torque vector or its center? | |
Aug 18, 2015 at 14:16 | comment | added | John Alexiou | Related: physics.stackexchange.com/a/199709/392 | |
Aug 18, 2015 at 14:15 | comment | added | user263399 | From the problem statement you have given it seems like the rod is just going to be balanced when you release it and undergo no change. | |
Aug 18, 2015 at 14:04 | history | asked | Tripti Khulbe | CC BY-SA 3.0 |