alleryEscape velocity from a planet of mass M and radius R is v. From a planet of mass 4M and radius 2R, escape velocity:
A4v
B2v
Cv
D√2 v
Answer & Solution
Correct answer: D. √2 v
v_esc = √(2GM/R). Original = √(2GM/R).
New = √(2G(4M)/(2R)) = √(4GM/R) = √2 × √(2GM/R) = √2 v.
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