Question

Why does a rocket go up inspite
of earth's gravity

Answer 1

Motion of Rockets or jet planes :
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The Rocket or jet aeroplane's engine expels hot gases ( produced due to the burning of fuel) with large speed in the downward direction from it's rear end. According to Newtons third law of motion , an equal and opposite reaction acting on the rocket pushes the rocket in the upward direction.



Rocket propulsion ( Movement of a rocket in the upward direction )
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The movement of a rocket in the upward direction can also be explained with the help of the law of conservation of momentum.

The momentum of a rocket before it is fired is 0. When the rocket is fired, gases produced in the combustion chamber of the rocket due to the burning of fuel. These gases come out of the rear of the rocket with high speed. The direction of the momentum of the gases coming out of the rocket is in the direction of the momentum of the gases coming out of the rocket is in the downward direction.

To conserve the momentum of the system , the rocket moves upward with a momentum equal to the momentum of the gases . The rocket continues to move upward as long as the gases are ejected out of the rocket.

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BEST OF LUCK ;-)

#akashmandal.

Answer 2

Explanation:

when the rocket is fired gases produced in the combustion chamber of the rocket die to the burning of fuel. To conserve the momentum of the system , the rocket moves upward with a momentum equal to the momentum of the gases. The rocket continues to move upward as long as the gases are ejected out of the rocket.