Gravitation Question 151
Question: The escape velocity on earth is 11.2 km/s. On another planet having twice radius and 8 times mass of the earth, the escape velocity will be[Bihar CMEET 1995]
Options:
A) 3.7 km/s
B) 11.2 km/s
C) 22.4 km/s
D) 43.2 km/s
Show Answer
Answer:
Correct Answer: C
Solution:
$ [\frac{v_{p}}{v_{e}}=\sqrt{\frac{M_{p}}{M_{e}}\times \frac{R_{p}}{R_{e}}}=\sqrt{8\times \frac{1}{2}}=2] $ $ [v_{p}=2\times v_{e}=22.4km/s] $
