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Another (mostly) calculus question
#1
Another (mostly) calculus question
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.
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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

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