Timeline for The best way in which a man can pull a train
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 25, 2014 at 6:01 | history | edited | bobie | CC BY-SA 3.0 | added 1 character in body |
| Sep 11, 2014 at 11:04 | comment | added | bobie | I took no offence, Olin and even accepted your answer, with some reservations, of course. Can you find [the] mistakes and misconceptions in my answer, too? | |
| Sep 11, 2014 at 10:10 | vote | accept | bobie | ||
| Sep 12, 2014 at 8:20 | |||||
| Sep 3, 2014 at 16:26 | comment | added | BlueTrin | Olin although you are right, you can say exactly the same thing without mentioning that it is freshman physics. Just correct the misconception, explain as you did, then just say that if you want to read about it, find a physics book about forces or even better include a reference. There is no point mentioning that this is freshman physics, this is why some people are saying that your tone was condescending. | |
| Sep 3, 2014 at 15:50 | comment | added | Olin Lathrop | @bobie: I don't consider the question stupid. The problem is that you don't really understand forces and energy. This is context necessary for understanding answers to your question. That is something this site is not well suited to deal with. You seem to be wanting to understand, so I really think reading a introductory physics text would be a good move for you. | |
| Sep 3, 2014 at 13:05 | comment | added | Olin Lathrop | @Señor: Then perhaps you can try explaining this to someone that doesn't really understand forces and energy. It's OK to ask basic physics questions here, but asking more complicated ones when you don't understand the basics enough to make sense of the answer just doesn't work well for this site. What would you have me do, duplicate the introduction of forces from high school physics? That would be long, and no different from what the many existing text books already do, hence the recommendation to go read one. | |
| Sep 2, 2014 at 22:25 | comment | added | Señor O | @OlinLathrop good answer, minus the condescending comments. | |
| Sep 2, 2014 at 16:59 | comment | added | Olin Lathrop | @bobie: In the lateral direction it is. All forces have to balance (when there is no accelleration) along all directions. Breaking this up into vertical and horizontal is useful because the pulling force is horizontal and gravity is vertical. | |
| Sep 2, 2014 at 13:42 | comment | added | fibonatic | @bobie if there would be no friction (assuming the train does not gain or lose gravitational potential energy) then any (non-zero) force can achieve any velocity of the train. A smaller force will just take longer. | |
| Sep 2, 2014 at 13:20 | comment | added | Olin Lathrop | You asked about forces, and now you're confusing things by asking about energy. Sorry, but it seems you don't really understand either, and this isn't the place to replay a year of high school physics before answering a question. Go read a basic introductory physics text. | |
| Sep 2, 2014 at 13:02 | history | answered | Olin Lathrop | CC BY-SA 3.0 |