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Question

Calculate the force of gravitation between the earth and the Sun, given that the mass of the earth=6×1024kg and of the Sun=2×1030kg. The average distance between the two is 1.5×1011m.

Solution
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Given : Mass of earth m=6×1024kg

Mass of Sun M=2×1030kg
Distance between sun and earth r=1.5×1011 m
Force of gravitation between them F=GMmr2
F=6.67×1011×(6×1024)×(2×1030)(1.5×1011)2

F=(80.04×1043)2.25×1022=35.57×1021(1010)=3.56×1022N


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