Timeline for Can infinite work be done?
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 9, 2016 at 5:36 | vote | accept | The Cryptic Cat | ||
| Feb 9, 2016 at 5:44 | |||||
| Oct 26, 2015 at 17:31 | history | edited | user83548 | CC BY-SA 3.0 |
deleted 3 characters in body
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| Oct 26, 2015 at 1:46 | comment | added | user83548 | I said the elevator does work! (the normal force) | |
| Oct 26, 2015 at 1:36 | comment | added | MichaelS | I agree that work done by an object isn't relevant to work done on an object, but that was in a comment, not part of the answer. And was likely intended to mean "net work on the object" rather than what it states. | |
| Oct 26, 2015 at 1:32 | comment | added | MichaelS | You should clarify precisely what you think is wrong with the answers in place. You just say the answers "are wrong". The post above is based on false presumptions. First, the question isn't asking about moving in a gravity field, so answers that don't discuss this point are incomplete, not wrong. Second, you are wrong in thinking no work is done by the elevator in your example. | |
| Oct 26, 2015 at 1:20 | comment | added | user83548 | @MichaelS perhaps you should read again the reasons for the bounty | |
| Oct 26, 2015 at 1:17 | comment | added | MichaelS | Acceleration fields, like gravity, are a bit weird. Work done when moving vertically against gravity is non-zero. As the elevator moves upwards, it's doing positive work on the object inside. The other answers are talking about moving outside an acceleration field, or along an equipotential surface within the field, like the question is asking about. See this page for some more details. | |
| Oct 25, 2015 at 22:05 | history | answered | user83548 | CC BY-SA 3.0 |