Physics Question

[Solarian]

@krgoodwin

well yea, but if there is no lift being created then the plane will act just as a car (one thats powered by a rocket but a car all the same). are you saying a rocket powered car will drive right off a treadmill? just becasue it has turbines propelling it doesnt mean you can ignore the laws of gravity and friction. if the jet had its engines off and you run the treadmill it will just sit there and move backwards with the treadmill. now apply equal force (in this case a jet engine) in the oposite direction and it will cancel out the backwards movement. leaving the plane sitting completely still. i agree the wheels have nothing to do with making the plane move but untill the plane gets up enough speed to create lift it just shoves itself along the ground like a car.

Lift IS being created. Jeesus.
It won’t sit there and move backwards with the treadmill! There is no equal force! The treadmill applies a negligibly small force of friction in the rearward direction. The turbines apply a ginormous force in the forward direction. Plane goes forward.
IT MAKES LIFT B/C IT GOES FORWARD.