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by phh
54 days ago
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Laying out the math (assuming earth is an homogeneous sphere) just in case it's not clear: F_gravitational = G m1 m2 /r^2 g = G Mass_earth / r_earth^2 Mass_earth = r_earth^2 * g/G Density_earth = r_earth^2 * g/G / V_earth Density_earth = 3*g / (4*Pi*G*r_earth) Prior to Cavendish we already new g and r_earth, just missing G. |
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