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Homework Statement
we all know to measure g.p,e(gravitational potential enery) we would likely to use g.p.e = mgh,
however from the theory of Newton gravitational potential energy theory, g.p.e = G[tex]\frac{m1m2}{r}[/tex], my lecturer told me that mgh is not equal to G[tex]\frac{m1m2}{r}[/tex]
Homework Equations
my question is anyone know why they are not equal?