Another universal gravitation question

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Homework Help Overview

The discussion revolves around gravitational potential energy and its behavior as one moves away from the Earth's surface. Participants are exploring concepts related to gravitational fields, potential energy, and the implications of distance from gravitational sources.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the relationship between distance from the Earth's surface and gravitational potential energy, particularly in the context of being far from gravitational fields or at the center of the universe. They are considering whether gravitational potential increases or decreases with height and the implications of being in space.

Discussion Status

The discussion is active, with participants sharing their thoughts and seeking clarification on the concepts. Some have expressed confusion about the behavior of gravitational potential energy at varying distances, indicating a productive exploration of the topic.

Contextual Notes

Participants are reflecting on their learning from a classroom setting and are encouraged to think critically about gravitational concepts, including the effects of distance on gravitational potential energy.

JimmyRay
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As you get further away from the Earth's surface your gravitational potential energy increases, but when you get closer center of the universe (or something like that) your gravitational potential is decreasing... ? Meaning when you are the FURTHEST away from the Earth's surface your gravitational potential is zero...

We were learning about gravitational potential energy and my teacher told us to THINK about that question...

Well when you're at the center of the universe, there is no gravity? Or you're so far away from everything it can't affect you?
 
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My mind tells me to choose both, which is why I say those both apply..
There is no gravity in space, then again you're far away from any gravitational fields to even be affected.
So yeah. :D
 
I see... Thank you
 
At the surface of the Earth the acceleration due to gravity is 9.8 m/s2.
This value decreases as you get farther from the surface.

If you look at the equation [tex]U_g = mgh[/tex] you can see that the higher you go the more your potential energy. However, you also have to take into account that as you go higher, g decreases.
 
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I understand that the higher you go the more your gravitational potential but what about once you get into space or...the center of the universe... wouldn't your gravitation potential DECREASE even though you've gone HIGHER?
 

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