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Question: The escape velocity from the earth is about 11 km/s. The escape velocity from a planet having twice ...

The escape velocity from the earth is about 11 km/s. The escape velocity from a planet having twice the radius and the same mean density as the earth is –

A

22 km/s

B

11 km/s

C

5.5 km/s

D

15.5 km/s

Answer

22 km/s

Explanation

Solution

v = =

v µ R

v = 2v0