ignoring the gravitational effects of all astronomical bodies other than the ear

Question

ignoring the gravitational effects of all astronomical bodies other than the earth, for a rocket to move from the surface of the earth to a point infinitely far away from the surface of the earth, it must be launched

A. horizontally with an initial velocity of more than 11.2 km/s
B. vertically with an initial velocity of more than 11.2 km/s
C. with an initial velocity directly proportional to the mass of the object
D. a rocket cannot be launched to a point infinitely far away from the surface of the earth because to do so would require an infinite initial velocity

Explanation / Answer

C. with an initial velocity directly proportional to the mass of the object

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