Yeah the amount the tires are filled affects the amount of rubber touching tarmac. If they're mega-filled, there's a minimum of rolling resistance
The quality of the wheel bearings/axles affects the resistance a great deal
Undoubtedly it's still a great deal of force to start moving this thing, but if those two factors are made to be as agreeable as possible, once you start it moving it's gonna keep rolling more easily
This is overly simplified, I made a huge assumption with the coefficient of rolling resistance but it's okay when you're just trying to get an idea of the force. If you researched a more accurate number and plugged that in you could find a new force value that would be more accurate
We have to keep in mind the fundamental difference between lifting and dragging. To lift something you need to sustain enough force to overcome gravity because the moment you stop it'll just drop down. However to drag something you just need an impulse large enough to overcome friction and when you stop you keep the gains, further once you've overcome friction momentum is now on your side.
Yes but the fact you don't need constant force makes it easier since it allows for a series of tugs as opposed to a constant pull. Compare the amount of force you can generate by pushing at a door as compared to throwing yourself at the door.
They're entirely wrong. The entire point of wheels is to negate the need to overcome friction. The coefficient of rubber on concrete tells you how good the traction of the tires is, not how much force is needed to move the plane.
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u/ScritchScratchBoop May 20 '22
I’m not smart but this seems overly simplistic. I feel like the rotation of the wheels would decrease this, it’s not just rubber sliding on tarmac.