a rocket a large voluene of gases produced by the combustion of fuel is allowed to escape through ! its tail nozzle in the downward direction with the tremendous tremendous speed land makes the rocket to move upward, which principle is followed in this lake off lake off of the rocket:
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As the rocket is moving upward by ejecting gases, its mass is getting decreased gradually. As momentum is the product of the mass and velocity that is p=m×v. Hence momentum decreases as mass is decreasing.
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