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Reaction mass? Answered

The water should be called reaction mass. The reason it makes the rocket go higher than just air is it has more mass to eject. Rocket thrust is a product of (ejected) mass times velocity. Either greater velocity (higher pressure from pump) or greater mass (water) produces greater thrust.

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mikeasaurusBest Answer (author)2017-03-30

Reaction mass is the right word for this. Thank you, I've made some updates to that lesson.

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