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Question 30763
JEE Physics · Medium

Gravitation: JEE — Escape Velocity Ratio MCQ

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JEE — Escape Velocity RatioMediumQuestion 30763

Question

Planet P has same mass as Earth but twice the radius. Escape velocity from P compared to Earth:
  1. A
    Same
  2. B
    √2 times
  3. C
    1/√2 times
    Correct
  4. D
    2 times

Correct answer

1/√2 times

Explanation

v_e = √(2GM/R). Same M, double R: v_e' = √(2GM/2R) = √(GM/R) = v_e/√2.

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