alleryThe escape velocity of a rocket fired from the Earth is the velocity needed to overcome the:
AMoon's gravitational pull
BEarth's gravitational pull
CCentripetal force of rotation
DAtmospheric pressure layer
Answer & Solution
Correct answer: B. Earth's gravitational pull
1. Escape velocity is the minimum speed needed to break free of a body's gravity.
2. For a rocket leaving Earth, the dominant force to overcome is Earth's gravity.
3. Hence it must overcome the Earth's gravitational pull.
_Source: RRB Group D (RRC) PYQ, held 27-10-2013, Q.30._
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