Posted: 1/22/2009 12:08:18 PM EDT
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Because there is friction between the wheels and axles, there would be some speed of the treadmill that would overcome gravity. But the mechanism couldn't take it. The airplane produces thrust. If that were the case, the dumbass and his skateboard would rocket off the treadmill after something in his trucks failed. The heat from that friction would be amazing. |
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He obviously would roll down off the treadmill long before anything else could happen.
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Because there is friction between the wheels and axles, there would be some speed of the treadmill that would overcome gravity. But the mechanism couldn't take it. The airplane produces thrust. If that were the case, the dumbass and his skateboard would rocket off the treadmill after something in his trucks failed. The heat from that friction would be amazing. |
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He obviously would roll down off the treadmill long before anything else could happen.
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Because there is friction between the wheels and axles, there would be some speed of the treadmill that would overcome gravity. But the mechanism couldn't take it. The airplane produces thrust. If that were the case, the dumbass and his skateboard would rocket off the treadmill after something in his trucks failed. The heat from that friction would be amazing. Nah. If it could accelerate infinitely fast, it would instantly hit the speed necessary for the friction to hold it in place, if nothing failed. Then if nothing failed by then, it'd instantly fail because of the massive heat buildup at the very least. |
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Gravity is the external force in this problem. Resolve the force into one normal and another parallel to the surface of the treadmill to understand how this one works.
Once you've done that part, the rest of the problem is exactly like the airplane problem. Don't make me post the "Story". 
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Did we learn nothing from the airplane discussions? Holy fucking Christ people. Can i get the link to that thread?  There are four or five in the archive. Two are 90 pages long. If you read them, your IQ is in danger of taking a dive if your blood pressure doesn't kill you first. |