1.

Two identical solid copper spheres of radius R placed in contact with each other. The gravitational attracton between them is proportional to                                      [Kerala PET 2005]

A.                \[{{R}^{2}}\]       
B.                \[{{R}^{-2}}\]
C.               \[{{R}^{4}}\]       
D.                \[{{R}^{-4}}\]
Answer» D.                \[{{R}^{-4}}\]


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