Mass of moon is 1% mass of earth . What will be the ratio of gravitational pull of earth on moon to moon on earth

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Solution

The gravitational pull on earth by moon is same as that of the pull on moon by earth. It is because the while calculating the force we make use of masses of both the objects as,
F12=F21=GM*(Earth)M(Moon)/(r)^2
where r is the distance between them.
Therefore the ratio of gravitational pull on moon by earth to the pull on earth by moon will be, F12:F21=1:1

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