Timeline for Do I have to know the General Relativity theory to understand the concept of inertial frame?
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9 events
| when toggle format | what | by | license | comment | |
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| Jul 23, 2019 at 8:02 | comment | added | John Rennie | @TaeNyFan in GR gravity isn't a force so it's hard to answer your question. | |
| Jul 23, 2019 at 7:25 | comment | added | TaeNyFan | In your answer's first paragraph, what if the object you are holding experience a force, e.g. gravity and thus moves? Does that still mean that you are not in an inertial frame? | |
| Mar 28, 2019 at 5:43 | comment | added | John Rennie | @onurcanbektas I'm in the physics chat room at the moment if you want to discuss this. | |
| Mar 28, 2019 at 5:34 | comment | added | Our | I'm quite confused with the given example; assume that I'm in an inertial frame, and I, somehow, have an electron in my pocket; I pull it out and let if go. If there is an electric field in the region where I'm, the electron will accelerate even though I'm an inertial frame, by assumption. Similarly, for a general case, if you and the object are accelerating at the same rate wrt to an inertial frame, when you let that object go, you will see that the object is floats, but still you are not an inertial frame. | |
| Mar 21, 2019 at 7:29 | comment | added | The Vee | But this does not answer why we also use the term "inertial frames" in the case of myself sitting on a chair, when speaking out of the context of GR. Indeed, why the term even existed prior to GR. I'm siding with Paul below, that the definition depends on what is a fictitious force, with gravity being one in GR but not virtually anywhere else. In Newtonian mechanics, for example, it is but an external field that penetrates the frame and affects motion in it, on top of inertia. | |
| Mar 20, 2019 at 19:58 | comment | added | wizzwizz4 | @8protons No. Because actually, you're travelling in a straight (inertial) line through spacetime, which happens to cause you to intersect with the planet. The planet – and everything on it – is accelerating towards you, and not the other way around. | |
| Mar 20, 2019 at 19:15 | comment | added | 8protons | In your example where you and the pen are falling together w/ same acceleration, isn't that a non-inertial frame? | |
| Mar 20, 2019 at 10:09 | history | edited | John Rennie | CC BY-SA 4.0 |
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| Mar 20, 2019 at 10:03 | history | answered | John Rennie | CC BY-SA 4.0 |