A) \[44.8km/s\]
B) \[22.4km/s\]
C) \[5.6km/s\]
D) \[11.2km/s\]
Correct Answer: B
Solution :
As, escape velocity, \[{{\upsilon }_{e}}=\sqrt{\frac{2Gm}{R}}=1.2\,km/s\] When R is taken as \[\frac{R}{4}\] \[{{\upsilon }_{e}}\sqrt{\frac{2Gm}{\frac{R}{4}}}\,\,km/s\] \[=2\sqrt{\frac{2Gm}{R}}=2\times 11.2=22.4\,km/s\]You need to login to perform this action.
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