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REPORT ABUSIVE REPLY
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Message Subject
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NASA Thrust Equation gets destroyed.
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Poster Handle
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Anonymous Coward |
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Post Content
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Fluids move due to pressure gradient force. The pressure broke apart the soda can and physically pushed it. If there is nothing to push she. The gas moves to low pressure, there is no opposite force
Quoting: Anonymous Coward 58747496 Your problem is that you're thinking of force. F = ma is what Newton said. So one could conclude that with no external force, there's no acceleration. But he was wrong in the case of masses that change. That conclusion would be wrong. Actually it's F = dp/dt = ma + v dm/dt so with no external force, momentum is conserved. And that's why rockets work. Because of the nonzero v dm/dt term. So Newton was wrong? Do you have any evidence of this? Yeah, here are two proofs. (1) Look at any modern physics textbook that deals with rocketry. Or just look up "conservation of momentum" and see that it's considered a fundamental principle of physics. (2) Rockets work. Dude that’s not proof
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