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[quote][i]Originally posted by Paul_J[/i] [quote][i]Originally posted by SVM 286[/i] [quote][i]Originally posted by Paul_J[/i] SVN mate you need to learn what speed is and what a force is. there's a big difference. Speed is a measure of how fast something moves, a Force is a FORCE acting. If you walk towards me at 5 mph, with a force of say 100 Nm and I walk at you at 5mph with only a force of 70 Nm, will you be able to walk forward? or will we meet in the middle and stop? I think you'll be able to push me backwards and continue walking forward. Regardless of our speeds being the same. [/quote] Sarcasm isn't required Paul. This thread has become quite unpleasant enough without that. I did plenty on forces in school and college. The premise in this example is that the plane's speed will be matched by the belt. If you have decided that is not the case, I have wasted my time and you've had a good laugh at my expense. [/quote] I was not being sarcastic :boggle: was just trying to use an example I'm saying the speeds can be matched, but the forces can still overcome it. So plane accelerates one way, and conveyour belt accelerates the other way. so one sec the plane is at 100 mph and the conveyour belt is whizzing at 100 mph opposite, then the plane is 110 mph and the conveyour belt is whizzing at 110 mph opposite. The plane is MOVING, not stationary... so it's covering distance down a infinately long conveyour belt down 'the runway'... [/quote]
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