Intensity of Gravitational Field :: Discussion


4.If the diameter if the earth becomes twice its present value but its mass remains unchanged, then how would be the weight of an object on the surface of the earth affected?
A.1/2 W
B.1/3 W
C.1/4 W
D.W
Answer:  Option  C
Explanation:

Weight of the body,
W=mg=GMm/R2
When the diameter or radius of the earth becomes double its present value, the weight of the body will be
W’=GMm/((2R)2 )=1/4 W
That is, the weight will become one-fourth of the present value.

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Published by:Michael Daani

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