GravitationHard
Question
For a planet having mass equal to mass of the earth but radius is one fourth of radius of the earth, Then escape velocity for this planet will be :-
Options
A.11.2 km/sec.
B.22.4 km/sec.
C.22.4 m/s.
D.44.8 km/sec.
Solution
As Vesc ∝ 
= 2
Vplanet = 11.2 × 2 km/sec
= 22.4 km/sec
= 2Vplanet = 11.2 × 2 km/sec
= 22.4 km/sec
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