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Question

Show that weight of the body on moon is 1/6 times its weight on earth.

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Solution

We=GMemRm2

Weight of the object on the moon is
Wm=GMmmRm2

So, the ratio of object of weight on moon to weight on earth is.
WmWe=GMmmRm2×Re2GMemWmWe=MmMe×(ReRm)2=Mm100Mm×(4RmRm)2=16100=16

Therefore, the weight of an object on the moon is about 16 of its weight on the earth.


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