Timeline for Which force is doing the work here?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Jul 6, 2020 at 6:19 | history | edited | user258881 | CC BY-SA 4.0 |
Typo
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| Jul 5, 2020 at 22:10 | comment | added | Cort Ammon | ... its the other ball that moves | |
| Jul 5, 2020 at 22:10 | comment | added | Cort Ammon | I would consider it more of a convention. Its a way of thinking about how things move. However it does have a tie in to work. Depending on our frame of reference, we may find that all of the work done is done by the "action," or all of the work is done by the "reaction" or both. Consider a case where you have two steel balls and a force drives them apart. From the perspective of an outside observer, it looks like some work was done to each ball. However, if you view it from the perspective of one ball, the work was done to the other ball, because... | |
| Jul 5, 2020 at 20:44 | comment | added | Vulgar Mechanick | Oh ok. Is this just a convention or does this have anything to do with the definition of work ? | |
| Jul 5, 2020 at 20:05 | comment | added | Cort Ammon | @OVERWOOTCH For every force, its work done is force times displacement. Applied force, reaction, always the same. However, when we start talking about energy, we typically care about which body expended the energy to do the work. In this case, one body (the skater) is expending energy and one body (the rail) is not. | |
| Jul 5, 2020 at 19:32 | comment | added | Vulgar Mechanick | I am aware that this not being a rigid body, we cant just multiply “force” and “displacement”. But which force is actually doing the work? The reaction force or the applied force itself? This is where im confused | |
| Jul 5, 2020 at 19:06 | history | answered | Cort Ammon | CC BY-SA 4.0 |