Phystcs
posted by Anupam khatiwara .
How does the force between two objects change when the mass of one object and distance between the two object are doubled.

Phystcs 
MathMate
Newton's law of gravitation stipulates that the attractive force F between two objects of masses M and m at a distance r apart is given by:
F=GMm/r² where G is the gravitational constant.
From the above relation, can you figure out the ratio of the new force after the changes?
(compare with G(2M)m/(2r)²)
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