Where does centre of gravity and centre of mass differ?, Physics

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WHERE DOES C.O.G AND C.O.M DIFFER?....GENERALLY BOTH COINCIDES....GIVE EXAMPLE WHERE BOTH DIFFER?

Ans) C.O.G and C.O.M mainly coincides at the see-level region.But C.O.G is a variable and changes with the value "g" and thus "Mg" of any body also changes.e.g At high altitudes like himalayas, mountains(C.O.G & C.O.M)differs,at the depth of earth,s surfaces. C.O.M is constant everywhere in the universe.


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