Center of Mass & Gravity: Non-Uniform G Field Answered

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Discussion Overview

The discussion revolves around the concepts of center of mass and center of gravity, particularly in the context of non-uniform gravitational fields. Participants explore the differences between these concepts and their implications in various scenarios, including extreme conditions like falling into a black hole.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants suggest that for practical purposes, center of mass and center of gravity are often considered the same on Earth.
  • One participant describes a scenario involving a black hole, where the gravitational pull differs across the body, leading to a distinction between center of mass and center of gravity.
  • Another participant asserts that the center of mass and center of gravity are different in non-uniform gravitational fields, noting that the term "center of gravity" is applicable only in uniform gravitational conditions.
  • A participant requests clarification on where gravitational forces are uniform versus non-uniform.
  • It is mentioned that the center of gravity is the point at which gravitational forces can be considered concentrated for torque calculations, with an acknowledgment that this point may not always exist.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between center of mass and center of gravity, particularly in non-uniform fields. The discussion remains unresolved regarding specific conditions under which these concepts apply.

Contextual Notes

There are limitations in the discussion regarding the definitions of uniform and non-uniform gravitational fields, as well as the assumptions underlying the scenarios presented.

muhammadusman
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Here is a simplified laymanized. answer given to me one time. Often for practical purposes, center of mass and center of gravity are considered the same on "earth".

If you were falling into a "black hole", pull of gravity on your feet may be much stronger than on your midsection. Midsection stays "center of mass". Feet become "center of gravity".

I'm sure you'll get a much better answer from others here.
 


center of mass and center of gravity different in non uniform gravitation field?expl

yes.

The center of mass is often called the center of gravity, but this is only true in a system where the gravitational forces are uniform
http://en.wikipedia.org/wiki/Center_of_mass
 


u r right but can u tell me that where the gravitaional forces are uniform nd where are these forces nonuniform.
 

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