Question

Two spheres of masses 30 Kg and 50 Kg are 55 cm apart. Calculate the force between them:​

Answer 1

Answer:

The gravitational force of attraction between two objects of masses m1 and m2 separated by a distance r is given by  

F = Gm1m2/r2,  

where G is the universal gravitational constant. G = 6.67x10-11 N m2/kg2.

The gravitational force of attraction between two objects of masses 50 kg and 120 kg kept at distance of 10 m from each other is

F = 6.67x10-11 N m2/kg2. 50 kg x 120 kg /(10 m x 10 m)

= 400.2 x 10-11 N

= 4.002 x 10-9 N

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Answer 2

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F = G M1 M2 / r^2

F = 6.67 × 10^-11 × 30 × 50 ÷ 55 × 55

F = 10005 × 10^-11 ÷ 3025

F = 3.3 × 10^-11 N

$force = 3.3 \times 10^{ - 11} newton$

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