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Based on the problem setup and numbers I sent Tuco. If it is moving backwards and the wheel speed is greater than 470mph it slows down, but keeps moving backwards. If the wheel speed is less than that it will eventually reverse direction, pick up forward speed, and take off. It's simple...

Does it hurt that you can't understand the problem setup that I sent you? I solved for the required coefficient to counteract the thrust, then solved for the velocity required to get that c. The coefficient at 470mph on asphalt compares to the coefficient at practical speeds in sand...

Serious response: no it doesn't. Every wheel, no matter how it is propelled forward, has rolling resistance in the opposite direction. Rolling resistance is the product of non-elastic effects of wheel deformation.

You cut to the core of me Baxter...

You can insult me all you want, the physics simply don't back up your assertion. You have your answer already, but please continue to allow your cognitive dissonance to reign.

No I just draw the line at making up equations to suit your fancy. The equation I linked literally says the coefficient increases with the square of velocity. If you hold c at the value you gave it actually spits out a very low velocity. If you weren't so lazy you could easily google images...

No bro. Do your own extrapolations.

To whom were you directing your ire? I must have misunderstood. Electrical engineer. Tuco it doesn't work that way. Plot c versus v. You can't just hold c constant for all values of v.

http://www.engineeringtoolbox.com/ro...ce-d_1303.html

I bet you take Jehovah's witnesses at their word too. Ever try thinking for yourself? This is the science thread, so if you don't want to science then GTFO. The problem presents an interesting paradox depending on how it is worded/interpreted.

And I did screw the pooch earlier and conflate different concepts. The only thing that would keep it stationary on the treadmill is the rolling friction/resistance at extremely high wheel speed. The speed differential crap was just that, crap. Wandered off the res on that one...

No, I found an equation for the coefficient that varies with velocity. It is affected by tire pressure (which affects the non-round contact patch size I assume) and the square of velocity. So at practical rolling speeds it is very low. But when velocity increases it does go up.

Next problem gentlemen.

37.2

Woulnd't want to leave you unfulfilled Tuco. As fast as necessary so rolling friction overcame forward thrust <3

Got a spot right next to me here with your "no-frictional forces" sign on it...

The higher the wheel speed, the greater the frictional forces. The concept doesn't work with anything other than a fictitiously large treadmill which can move at the plane's takeoff speed at a minimum, which is what you would need to put a plane on it. What they had was crap, because the truck...

I'm able to watch the video and see their experiment failed to replicate the basic premise of the myth, which is typical for them. If the force backwards from the "treadmill" acting on the wheels and through friction onto the plane equals the force forward due to propeller thrust, the plane...

Infractions for the guy that actually understood the physics of the problem? Wow... What's the purpose of this thread again???

I have no doubts about our nation's poor showing in math and science rankings. The responses here are truly pathetic...

The Mythbusters are so fucking stupid when it comes to science. But brilliant when it comes to entertainment marketing to your average ignorant American.

Galactic Empire. Report on them!

Depends on the service. You get dick if you're horrible. Up to and over 100% of you're awesome.

The rocket does all the work unless the satellite carries an inertial upper stage/apogee kick motor (usually geos going from transfer to final orbit). The small thrusters on most spacecraft are just for stationkeeping, ie keeping it in a precise orbit, and end of life operations (deorbit for...

Sweden.

Dr. Manhattan. /thread

Obvious...

Lol that stiff arm denial!!!

****provided Murray stays...

The Namsieh?

Wut goin on up in hur? Oh that's right, tonight's the night the SEC picks up the trophy for the NC game played weeks ago.

How bout the aerial bombardment they put on the nations best pass defense?

You do know Georgia's run defense sucks right? Alabama had two 150 yard rushers against them in the SecCG. But Georgia is still going to win. So you tell us how it tastes.

Sounds like he makes a fine chief then, paper pusher, not duty cop.

And I specifically said look at the US military with all those drones and other tech against Iraqis and afghanis. Small arms in their hands had us at an impasse until the locals started helping. They were bleeding us dry until that happened. Did we kill a lot of them? Yep, but they were...

Mischaracterizarion ftw! Free Syrian Army Formed months after protests and armed clashes started, consists of ex soldiers and civilians alike. Even still the soldiers defected with, GASP, small arms!!!

How are you not getting this? There are real life examples going on right fucking now. Look at Syria. Assad has tanks and planes, bombs and missiles, and aherp derp, he's using them on his populace. What's the only thing that is allowing the resistance to even stand a chance of uniting and...

Small arms are everything up to and including small caliber machine guns. A good delineation is probably at .50 caliber. And yes, the populace having assault rifles will make a difference over and above just bolt action rifles and revolvers. Look at the rest of the world. Flooded with AKs...

The funny thing is they don't have to even look very far. Look at the mighty US military vs armed insurgents in Iraq and Afghanistan. It wasn't until the locals started helping that we became effective in eliminating them.

Useless chart is useless.