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] $
