In one of the solutions to the problems in my physics textbooks, it's written (without further explanation, as if it were somehow obvious) that the gravitational potential energy of a vertical rod is given by the formula U=1/2*m*g*l. How does that make any sense? The sum of the gravitational energy of the infinitesimally small parts of the rod is obviously U=integral(m*g*l,l,0,l)=1/2*m*g*l^2.
Our server costs ~$56 per month to run. Please consider donating or becoming a Patron to help keep the site running. Help us gain new members by following us on Twitter and liking our page on Facebook!
Current time: November 19, 2025, 2:58 pm
Thread Rating:
|
Another (mostly) calculus question
|
|
« Next Oldest | Next Newest »
|
| Messages In This Thread |
|
Another (mostly) calculus question - by FlatAssembler - April 26, 2019 at 12:57 pm
RE: Another (mostly) calculus question - by Fireball - April 26, 2019 at 2:13 pm
RE: Another (mostly) calculus question - by onlinebiker - April 26, 2019 at 2:25 pm
RE: Another (mostly) calculus question - by Fireball - April 26, 2019 at 5:37 pm
RE: Another (mostly) calculus question - by Cod - April 26, 2019 at 5:41 pm
RE: Another (mostly) calculus question - by Fireball - April 26, 2019 at 7:54 pm
RE: Another (mostly) calculus question - by onlinebiker - April 26, 2019 at 10:30 pm
RE: Another (mostly) calculus question - by Fireball - April 26, 2019 at 10:49 pm
RE: Another (mostly) calculus question - by brewer - April 26, 2019 at 4:18 pm
RE: Another (mostly) calculus question - by Smaug - May 7, 2019 at 3:41 am
RE: Another (mostly) calculus question - by polymath257 - May 7, 2019 at 3:04 pm
|
| Possibly Related Threads... | |||||
| Thread | Author | Replies | Views | Last Post | |
| Not sure I understand basic calculus... | FlatAssembler | 7 | 2090 |
February 16, 2019 at 10:53 pm Last Post: ignoramus |
|
| Great math interaction site for "beginners" (algebra, geometry, even calculus) | GrandizerII | 3 | 2586 |
October 20, 2016 at 10:48 pm Last Post: Jehanne |
|
| Fundemental theorem of Calculus intuition | A Handmaid | 19 | 5402 |
August 28, 2016 at 12:52 pm Last Post: Jehanne |
|
| Applied Calculus Problems | The_Flying_Skeptic | 0 | 3195 |
March 22, 2010 at 11:02 pm Last Post: The_Flying_Skeptic |
|
Users browsing this thread: 1 Guest(s)
