A rocket can go vertically upwards in earth's atmosphere because

Options :
  1. of the force exerted on the rocket by gases ejected by it
  2. it is lighter than air
  3. both are right
  4. none of the above
Answer and Explanation :-

Answer: Option 1

Explanation:

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I think that one of these days," he said, "you're going to have to find out where you want to go. And then you've got to start going there. But immediately. You can't afford to lose a minute. Not you.
-J.D. Salinger The Catcher in the Rye