The mass of Earth is represented by M and that of the Moon is represented by 2m. The distance between them is 2d. Which of the following expressions accurately represents the gravitational force acting between them?
A
2m×9.8
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B
None of the above
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C
M×9.8
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D
m×9.8
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Solution
The correct option is B None of the above The value of acceleration due to the gravity of Earth is 9.8 m/s2 but only near its surface. At a further distance from the surface, it is proportional to 1distance2