NEET 2013 Physics Escape Velocity MCQ Question
The radius of a planet is twice the radius of Earth. Both have equal average mass densities. If Vₚ and Vₑ are escape velocities of the planet and the Earth, respectively, then:
Vₚ = 1.5 Vₑ
Vₚ = 2 Vₑ
Vₚ = 3 Vₑ
Vₑ = 1.5 Vₚ
Correct Answer
Detailed Explanation
Escape velocity is proportional to the square root of the radius for constant density. Thus, Vₚ = √2 Vₑ = 2 Vₑ.
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