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<blockquote data-quote="Ayasano" data-source="post: 79361" data-attributes="member: 4804"><p>My mind is open in the sense that if enough rational evidence is provided, I will change it. (I do try to avoid confirtmation bias where possible, but alas, I'm only human) Examples of such evidence would be repeatable experiments performed under rigorous conditions whose results cannot be reconciled with commonly-accepted theories, or even a well-thought out thought experiment, although the latter would obviously carry less weight.</p><p></p><p>At no point did I state that a theory is a fact. I simply said that theories are <em>useful</em>. A theory is simply a model of something. (And not necessarily a mathematical one, for example, the "theory of mind") Models simply allow you to predict the outcome of a system given arbitrary starting states. Better models allow more accurate predictions.</p><p></p><p>As far as verifying every theory, this is simply an impossible task, not to mention a pointless one. Did you verify the theory of electromagnetism before you turned on your computer this morning? Did you verify germ theory before your last visit to a doctor? The beautiful thing about science is that it doesn't care whether or not you "believe" in a theory. Reality trumps belief every time.</p><p></p><p></p><p></p><p>Unless the car has wings or is a lifting body, there is no significant upwards force beyond the reaction force applied to the car by the road.</p><p></p><p>Let's break this down, shall we? Would you agree that in the absence of gravity, the car would move in a straight line away from the Earth at a tangent?</p><p></p><p></p><p></p><p>If I'm understanding this part correctly, you mean something along the lines of this: If you take a metal bar and drill a hole in one end and attach it to a motor, the torque from the motor will cause the bar to rotate. Applying a force to the end of the bar could cancel out the torque.</p><p></p><p>If the above is what you were describing, then the force applied to the end of the bar is itself generating a torque opposite to the torque generated by the motor, hence the units match up.</p><p></p><p></p><p></p><p>Could you please explain what you mean by "linear dynamic equations" and "rotational dynamic equations"? Are you referring to inertial/non-inertial/rotational reference frames or something else?</p></blockquote><p></p>
[QUOTE="Ayasano, post: 79361, member: 4804"] My mind is open in the sense that if enough rational evidence is provided, I will change it. (I do try to avoid confirtmation bias where possible, but alas, I'm only human) Examples of such evidence would be repeatable experiments performed under rigorous conditions whose results cannot be reconciled with commonly-accepted theories, or even a well-thought out thought experiment, although the latter would obviously carry less weight. At no point did I state that a theory is a fact. I simply said that theories are [I]useful[/I]. A theory is simply a model of something. (And not necessarily a mathematical one, for example, the "theory of mind") Models simply allow you to predict the outcome of a system given arbitrary starting states. Better models allow more accurate predictions. As far as verifying every theory, this is simply an impossible task, not to mention a pointless one. Did you verify the theory of electromagnetism before you turned on your computer this morning? Did you verify germ theory before your last visit to a doctor? The beautiful thing about science is that it doesn't care whether or not you "believe" in a theory. Reality trumps belief every time. Unless the car has wings or is a lifting body, there is no significant upwards force beyond the reaction force applied to the car by the road. Let's break this down, shall we? Would you agree that in the absence of gravity, the car would move in a straight line away from the Earth at a tangent? If I'm understanding this part correctly, you mean something along the lines of this: If you take a metal bar and drill a hole in one end and attach it to a motor, the torque from the motor will cause the bar to rotate. Applying a force to the end of the bar could cancel out the torque. If the above is what you were describing, then the force applied to the end of the bar is itself generating a torque opposite to the torque generated by the motor, hence the units match up. Could you please explain what you mean by "linear dynamic equations" and "rotational dynamic equations"? Are you referring to inertial/non-inertial/rotational reference frames or something else? [/QUOTE]
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