|
REPORT COPYRIGHT VIOLATION IN REPLY
|
|
Message Subject
|
Rockets need an atmosphere to propel
|
|
Poster Handle
|
Balance242 |
|
Post Content
|
...
prove it! I disproved it using simple experiment. Why don't you use simple experiment to prove it.
Quoting: Balance242 Rockets motors do not push against the atmosphere they push against the rocket body. simple test: put a scale on the pushed side of the rocket motor and measure the amount of force put the same scale on the exhaust side of the rocket motor and measure the force against the scale. The result will always be greater on the side to which the rocket moves (away from the exhaust) because of the effect of the rocket's thrust against the object it pushes through space and the atmosphere. There is no force. Air and other objects move out of the pipe, mass expelled, there is no opposite reaction on the scale. You can do this yourself at home. Make a container with your hand and see if you feel the opposite reaction. When wind blows towards your back, the air in front of your face also moves away from your face, did you feel the opposite reaction on your face? "For every action there is an opposite reaction." That is a fundamental law of physics 101. Also known as Newton's third law of motion, it explains why things move because of the force applied to them. Like the wind against my face for instance. Simple question: What pushes the wind against my face? By your reasoning because the atmosphere is there I should not feel anything and there should be no movement. The pennies in the tube lift because of the sudden rush of air out the tube, but if the vacuum process is slowed down to a point where the extraction of the gases in the tube isn't enough to lift the penny, then the penny won't move at all. The variable in your experiment is the speed at which you extract the air inside the tube, you are doing it at a high speed fast enough to raise the weight of a penny. The movement is simply due to pressure difference. This movement is not the same as throwing or pushing an object. If the air flow is strong enough to lift the penny, the force must be at least greater than the normal force of the penny. But this is not seen on the scale, therefore, equal and opposite reaction does not happen.
|
|
|
Please verify you're human:
|
|
|
Reason for copyright violation:
|
