Originally posted by mtthw
He didn't say it had to be a circular orbit.
Sonhouse: "The question is, can you drive it into some sort of orbit, even if its only a cm above the ground?"
Let's define the concept of orbit: I say that a orbit is off ground all the way round. If it is 1 cm off ground all the way round it is circular, if not it is elliptic. I think we can rule out a parabolic oand hyperbolic orbit here, because it is a closed orbit. If it tuoches the ground anyware round the moon, it is not an orbit. Do we agree on this?
If I say the orbit must be circular I am wrong, it doesn't matter if it is elliptic. But the main question stands: Can the vehicle leave the ground?
I say that when the vehicle has the speed it can leave the ground it cannot gain more speed so it actually can
leave the ground becous the wheel lose its contact and friction with the ground. That's why it cannot leave the road. (The road has no bumps.)
Once I read a book about astronautics and from that got some insights about planetary (and lunary) orbits...