Gravitational acceleration on the surface of a planet is 
g, where g is the gravitational acceleration on the surface of the earth. The average mass density of the planet is 
times that of the earth. If the escape speed on the surface of the earth is taken to be 11 kms –1 , the escape speed on the surface of the planet in kms –1 will be:
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(3)
Sol. g = 
= 
; g α ρ R
= 
= 
= 
Given
= 
V e = 
= 
⇒ V e α R 
; V e = 3 km/hr.
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