Prove gravity above 4000KM.
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Radius of Earth = R = 6, 400 km approximately
Gravity = G M / R^2 on the surface of earth = g = G M / (6400*10³)²
Gravity at 4000 km above Earth's surface = g' = GM / (10,400*10³)²
g' / g = 64² /104² = 64/169
g' = 64 * 10 / 169 m/sec²
Gravity = G M / R^2 on the surface of earth = g = G M / (6400*10³)²
Gravity at 4000 km above Earth's surface = g' = GM / (10,400*10³)²
g' / g = 64² /104² = 64/169
g' = 64 * 10 / 169 m/sec²
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