- #1
15ongm
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1. Problem
A rocket has landed on Planet X, which has half the radius of Earth. An astronaut onboard the rocket weighs twice as much on Planet X as on Earth. If the escape velocity for the rocket taking off from Earth is v , then its escape velocity on Planet X is
a) 2 v
b) (√2)v
c) v
d) v/2
e) v/4
The answer is C.
I reasoned out this problem mathematically, but what is the conceptual reasoning behind this?
A rocket has landed on Planet X, which has half the radius of Earth. An astronaut onboard the rocket weighs twice as much on Planet X as on Earth. If the escape velocity for the rocket taking off from Earth is v , then its escape velocity on Planet X is
a) 2 v
b) (√2)v
c) v
d) v/2
e) v/4
The answer is C.
I reasoned out this problem mathematically, but what is the conceptual reasoning behind this?