Quote:
Originally Posted by Fazor
No body seems to have a problem visualizing a gun firing in space, in that the bullet would exit the barrel but it would also propel the gun in the opposite direction. The only difference in the rocket is that the combusted fuel is not solid like a bullet...but it still has mass and momentum.
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I think that is the biggest issue. I look back to when I didn't understand the concept. I knew Newton's laws, but how can it apply to smoke? Smoke has no weight. It was hard to imagine the volume that is being presented.
Expanding gases made more sense at the time as... they take more room when they expand...and something has to give. Kind of like displacement.