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For a planet having mass equal to the Ea...

For a planet having mass equal to the Earth but radius is one fourth of radius of the Earth, then escape velocity for this planet will be…………

A

11.2 km/s

B

22.4 km/s

C

3.6 km/s

D

44.8 km/s

Text Solution

Verified by Experts

The correct Answer is:
B
Radius of earth = 4 Radius of planet
Escape velocity of planet `= sqrt(2(4R)g) = 2sqrt(2Rg)`
`=2xx 11.2 = 22.4 km//s`
(Escape velocity of earth = 11.2 `km s^(-1)`
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