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Originally posted by THIseNdsnowoldKings
Woldt it be very plausable to assume that the particles from the propulsion, could be bouncing off say..each other..each one pushing on the one that came before? Sounds liek that would be the simplest explanation to understand.
The truth is that the rocket does have something to push against: namely, its own fuel. Let's illustrate with an example you kids can try at home. First, you need to get yourself into some sort of frictionless situation. Wearing ice skates on a slippery ice rink would be good, or maybe your office has a chair that rolls really well on a hard surface. Next, you'll need a medicine ball. You are the rocket and the medicine ball is your fuel. Toss the medicine ball. You'll notice that as you shove the medicine ball forwards, you yourself lurch backwards. Ta-da, the miracle of physics! (If you think this is because the medicine ball pushed on the air, then try the experiment without the medicine ball--just push on the air with your hands, see how far you lurch backwards.)
Originally posted by ReelView
Didn't read all the posts but here's some food for thought..
1. If space is an "absolute vacuum" or anything close then what force makes it that way?
2. If so, then what force around a planet keeps the absolute vacuum of space at bay? Why isn't the atmosphere sucked up and evenly distributed across the solar system or beyond? IE a vacuum is a very, very powerful force.
3. Equal and opposite reaction really means that there is an equal reaction to proportional to the resistance offer to the thrust. In a vacuum resistance would be much lower as ie nothing there to resist and everything there eager to receive. In fact in an absolute vacuum the environment would welcome the thrust with open arms, so to say. The thrust would be a small attempt at quenching the thirst of the vacuum.