Two spheres of mass m and M of the same radius R are separated by a distance √8R as shown in the figure. The force of attraction between them is:
A
2√2GmM27R2
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B
GmM8R2
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C
GmM9R2
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D
√2GmM9R2
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Solution
The correct option is BGmM8R2 A spherical mass behaves identical to a point mass placed at its centre. So, the system can be visualized as a system of two point masses m and M which are separated by a distance of √8R.