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Question

A sphere of mass 50kg is attached by a second sphere of mass 90kg with a force equal to a weight of 0.5mg and their centres are 20cm apart. The gravitational constant is.

A
4.2×1011Nm2kg2
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B
6.23×1015Nm2kg2
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C
3.3×1011Nm2kg2
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D
4.4×1011Nm2kg2
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