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What exactly is gravity?
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<blockquote data-quote="Einstein" data-source="post: 196922" data-attributes="member: 288"><p>Mass is not weight according to the way I was taught in school. I was given a set of equalities: Weight=Force=Mass x Acceleration. But I was never presented with proof that those equalities exist. Just accept it. I was taught that mass is a quantity of matter and its value is considered constant throughout the universe.</p><p></p><p>Then we come into the real world and things aren't quite adding up. For instance one kilogram is considered to be equivalent to 2.2 pounds. Of course that can't be true. Unless we all were lied to. According to my math 2.2 pounds is equivalent to 9.8 Newtons. But if you go to a balance scale you can prove that 2.2 pounds does indeed balance out equivalent to one kilogram. So what gives? I'll side with the actual observation. What it boils down to is Weight equals Mass. And the measurement is done using the force of gravity. Basically gravitational weight cannot be separated out into mass and acceleration. Since I already demonstrated that an object under gravitational acceleration is weightless. Acceleration and weight are two different things. An object on the surface of the earth is not accelerating. Yet it has weight. Now I did come across an idea stating that space is accelerating downward through objects thus creating an acceleration field. If that could be proven then time machines would be real and also space drives. Prove it first. I'm not a fan of "Assume it to be true".</p><p></p><p>Inertial force requires the presence of an opposing acceleration vector. Gravitational force does not. This is the primary observable fact that makes Inertial force and Gravitational force different from each other.</p></blockquote><p></p>
[QUOTE="Einstein, post: 196922, member: 288"] Mass is not weight according to the way I was taught in school. I was given a set of equalities: Weight=Force=Mass x Acceleration. But I was never presented with proof that those equalities exist. Just accept it. I was taught that mass is a quantity of matter and its value is considered constant throughout the universe. Then we come into the real world and things aren't quite adding up. For instance one kilogram is considered to be equivalent to 2.2 pounds. Of course that can't be true. Unless we all were lied to. According to my math 2.2 pounds is equivalent to 9.8 Newtons. But if you go to a balance scale you can prove that 2.2 pounds does indeed balance out equivalent to one kilogram. So what gives? I'll side with the actual observation. What it boils down to is Weight equals Mass. And the measurement is done using the force of gravity. Basically gravitational weight cannot be separated out into mass and acceleration. Since I already demonstrated that an object under gravitational acceleration is weightless. Acceleration and weight are two different things. An object on the surface of the earth is not accelerating. Yet it has weight. Now I did come across an idea stating that space is accelerating downward through objects thus creating an acceleration field. If that could be proven then time machines would be real and also space drives. Prove it first. I'm not a fan of "Assume it to be true". Inertial force requires the presence of an opposing acceleration vector. Gravitational force does not. This is the primary observable fact that makes Inertial force and Gravitational force different from each other. [/QUOTE]
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