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The escape Velocity from the earth is 11...

The escape Velocity from the earth is `11.2 Km//s`. The escape Velocity from a planet having twice the radius and the same mean density as the earth, is :

A

22.4 km/s

B

11.2 km/s

C

5.56 km/s

D

15.5 km/s

Text Solution

Verified by Experts

The correct Answer is:
a
`(v_(e_(2)))/(v_(e_(1)))=(R_(2))/(R_(1))sqrt((rho_(2))/(rho_(1)))=2`
`v_(e_(2))=2v_(e_(1))=2xx11.2=22.4km//s.`
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