|
|
|
|
|
| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 3 Jun 2008 19:09:06 IST
|
|
|
why gravitional potential energy is negative
|
|
|
|
3 Jun 2008 19:13:24 IST
|
|
|
it is bcoz potential energy is due to attractive gravvitational force.
|
Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724
|
this reply: 0 points
(with 0 
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
3 Jun 2008 19:20:14 IST
|
|
|
This is because... as the distance between two particles (under consideration) decreases, their gravitational potential energy also decreases... but according to d equation
U=GMm/r
gravitational potential energy is inversely proportional to d distance between particles...
in order to satisfy both d conditions... a negative sign is introduced such that... as the distance decreases, numerically gravitational potential energy will also decrease... 
say if i'm wrong...!!!
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
3 Jun 2008 21:25:22 IST
|
|
|
Beacause gravitational force is always attractive in nature.
|
The Scientist does not study nature because it is useful; he studies it because he delights in it, & he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, life would not be worth living. Ofcourse I do not here speak of that beauty that strikes the senses, the beauty of qualities & appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmoniuos order of the parts, & which a pure intelligence can grasp. |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Jun 2008 11:13:31 IST
|
|
|
negative potential energy of a system meansthe system is bounded.
Suppose a particle in a bounded system has -x J energy.
If we apply +x J energy to the particle , it now has 0 J energy and hence is out of the bounded system.
If we apply +(x+2) J energy, the particle will come out of the system with 2J energy..
|
salman khan |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
