Question

calculate the gravitational force by which a stone of mass 1 kg placed on the surface of the Earth is attracted towards its Centre give mass of Earth is equal to( 6x10)24kg and radius of earth is 6400km​

Answer 1

Given:-

Mass of earth m1 =6 × 10²⁴kg

Mass of the object m2 = 1 kg

Radius of the earth =6.4 × 10⁶m

Universal gravitational constant G = 6.67 x 10-¹¹ Nm²kg-²

By applying universal law of gravitation: - F = (G×m1×m2/r²)

F= (6.67 x 10-¹¹ x 6 × 10²⁴x 1)/ (6.4 × 10⁶)²

By Solving the equation.

F = 9.8 N

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Answer 2

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