Gravitation Question 47

Question: If the mass of earth is 80 times of that of a planet and diameter is double that of planet and ?g? on earth is [9.8m/s2] , then the value of ?g? on that planet is [Pb. PMT 1999; CPMT 2000]

Options:

A) [4.9m/s2]

B) [0.98m/s2]

C) [0.49m/s2]

D) [49m/s2]

Show Answer

Answer:

Correct Answer: C

Solution:

[gp=ge(MpMe)(ReRp)2=9.8(180)(2)2] [=9.8/20=0.49m/s2]



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