Question

prove the value of g.

Answer 1

g = GM/R^2
G = 6.67 * 10^ -11 
M = 6 * 10^24 KG
R = 6.4 * 10^6 m
putting these values in the equation , we get
g = 9.81 m/s

Answer 2

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mg = G M × m / R²                     a = G M / R²

➧G = 6.7 × 10¯¹¹ N m² Kg²            (Gravitational Constant)

➧M = 6 × 10²⁴ Kg               (Mass of Earth)

➧R = 6.4 × 10⁶ cm            (Radius of earth)

So, g = G M / R²

➾ 6.7 × 10¯¹¹ N m² Kg² × 6 × 10²⁴ Kg / 6.4 × 10⁶ cm

➾ 9.8 m s¯² ...✔

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