Gravitation Question 150

Question: The escape velocity of an object on a planet whose g value is 9 times on earth and whose radius is 4 times that of earth in km/s is [EAMCET 1994]

Options:

A) 67.2

B) 33.6

C) 16.8

D) 25.2

Show Answer

Answer:

Correct Answer: A

Solution:

$ [\frac{v_{p}}{v_{e}}=\sqrt{\frac{g_{p}}{g_{e}}\times \frac{R_{p}}{R_{e}}}=\sqrt{9\times 4}=6] $ \ $ [v_{p}=6\times v_{e}=67.2km/s] $



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