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NEET UG PHYSICS MCQ: GRAVITATION

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A rocket is intended to leave the Earth’s gravitational field. The
fuel in its main engine is a little less than the amount that is
necessary and an auxiliary engine, (only capable of operating
for a short time) has to be used as well. When is it best to switch
on: the auxiliary engine?

View answer and explanation

Correct option: A

At take-off

Option A (At take-off) is correct because maximizing velocity early allows the rocket to overcome gravity more effectively.

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\left( { - K/{r^2}} \right)

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Statement-2: Because rotation of earth is about polar axis.