Unformatted text preview: the earth: 2 2 / 8 . 9 s m R M G g earth earth ≈ = . Experiment: In a vacuum all bodies fall with the same acceleration. g m a m g m a m g i g i 2 2 2 1 1 1 ) ( ) ( ) ( ) ( = = Dividing the two equations gives = 1 2 2 2 1 1 ) ( ) ( ) ( ) ( a a m m m m g i g i and since a 1 = a 2 2 2 1 1 ) ( ) ( ) ( ) ( g i g i m m m m = . We see that m i /m g is the same for all particles and hence we can define G such that m i = m g for all particles. Only one type of mass! Earth M e R e Mass m g Cannon Ball Feather Release both at t = 0 Both hit ground at same time! Inertial Mass F m i Gravitational Mass Set equal to 1...
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 Spring '07
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 Physics, Inertia, Mass, General Relativity

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