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
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Escape velocity =√2Rg
Radius of planet=1/4 Radius of earth
Radius of earth=4 Radius of planet
Escape velocity of planet =√2(4R)g
=2√2Rg
=2*11.2
=22.4
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The escape velocity for this planet will be 22.4 km/s.
Explanation:
Let m is the mass of the Earth as well as that of planet. If r is the radius of the Earth such that,
r' = (1/4) r, r' is the radius of the planet
The escape velocity of earth is equal to 11.2 km/s and the relation to find it is given by :
The escape velocity of this planet is,
v' = 22.4 km/s
So, the escape velocity for this planet will be 22.4 km/s. Hence, this is the required solution.
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