1.

The acceleration due to gravity near the earth's surface is 9.8 m/s2, and theearth's radius is 6,400 km. From this data calculate the mass of the earth. Use anyuniversal constant if required.

Answer»

we know

g = GM/R²

where g = acceleration due to gravity

G = Gravitational constant

M = mass of earth

R = radius of earth

g = GM/R²

M = gR²/G

M = 9.8 x 6.4 x 10^12 / 6.67 x 10 -11

M = 6.018 x 10^24 kg



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