Timeline for What is the "displacement" of the object in the definition of work?
Current License: CC BY-SA 4.0
9 events
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| May 9, 2018 at 20:23 | vote | accept | Simab Asif | ||
| May 9, 2018 at 20:18 | comment | added | Volker Siegel | @SimabAsif And to your question regarding "The work occurs while the force is applied.": that is roughly what the formula says - I'm not sure what is missing? But is sounds like there is a different question on your mind - if it's interesting, better post a new question. If we discuss it in the comments, it will get lost. And this site is about - while helping you - collecting good answers and good questions! | |
| May 9, 2018 at 20:13 | comment | added | Volker Siegel | And note that Newton not even knew that other galaxies exist, and what a galaxy is, to begin with. | |
| May 9, 2018 at 20:08 | comment | added | Volker Siegel | In math, you can prove things because math is about an abstract structure we have build ourselves and know completely. We can just say "if all that is true, this is true also, because a and b and c.". In physics, we do actually not even know whether Newtons laws are true in our whole universe. That it works here on earth, and probably our galaxy, does not mean it works everywhere. I would not expect that Newtons laws were meaningful during the first few seconds after the big bang. So it may not be applicable to the microwave background. | |
| May 9, 2018 at 19:59 | comment | added | Volker Siegel | There is nothing to prove! It can not be proven! It may even be wrong, on the level of quantum mechanics. We - Newton in this case - have found our universe behave like this, and he wrote down the formula describing it. | |
| May 9, 2018 at 19:56 | history | edited | Volker Siegel | CC BY-SA 4.0 |
added 476 characters in body
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| May 9, 2018 at 19:53 | comment | added | Simab Asif | Is there some sort of proof of what you just said "The work occurs while the force is applied.". I mean can you prove it with an example or some geeks theorem :) | |
| May 9, 2018 at 19:52 | comment | added | safesphere | You are walking downstairs. What work do your muscles do? Same force and displacement, but not nearly as much work as walking upstairs. | |
| May 9, 2018 at 19:48 | history | answered | Volker Siegel | CC BY-SA 4.0 |