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So that's why my car rolls... Is it?
Hi, I just wanted to clarify my thoughts so that I can convince my friends of the wonders of classical mechanics...
The reason that I find it hard to push a car is because of friction, and in the example of pushing a car this is because the atoms of the tyre are bonding, ultimately in terms of electrical and magnetic attractions, with the atoms of the road.
The reason it's harder to get the car moving with my initial push is that the atoms have a stronger force and as there are more of them due to the compression of the wheel, i.e.the area is slightly larger than the area of the turning wheel so there are more bonds. When the wheel is turning there are less atoms bonding due to the small amount of time they would all be exposed on a level plane (due to the atoms jiggling).
Would I be able to give that description? Wouldn't this be a good approximation of the reasons for static and kinetic friction? Can you add more or perhaps better reasons for this force.
That sentence "ultimately in terms of electrical and magnetic attractions" is from my book, if possible, though not essential, can anyone explain that intuitively, maybe the Coulomb equation explains this although I'm not too sure on how.
Another sentence from my book is " smoothing the surface can actually increase friction, since more molecules are able to interact and bond, " Now I've been told friction is all "Inertial" on yahoo yet my book, "University Physics, with Modern Physics" by Young and Freedman says differently, as in the previous quotes...
Hi, I just wanted to clarify my thoughts so that I can convince my friends of the wonders of classical mechanics...
The reason that I find it hard to push a car is because of friction, and in the example of pushing a car this is because the atoms of the tyre are bonding, ultimately in terms of electrical and magnetic attractions, with the atoms of the road.
The reason it's harder to get the car moving with my initial push is that the atoms have a stronger force and as there are more of them due to the compression of the wheel, i.e.the area is slightly larger than the area of the turning wheel so there are more bonds. When the wheel is turning there are less atoms bonding due to the small amount of time they would all be exposed on a level plane (due to the atoms jiggling).
Would I be able to give that description? Wouldn't this be a good approximation of the reasons for static and kinetic friction? Can you add more or perhaps better reasons for this force.
That sentence "ultimately in terms of electrical and magnetic attractions" is from my book, if possible, though not essential, can anyone explain that intuitively, maybe the Coulomb equation explains this although I'm not too sure on how.
Another sentence from my book is " smoothing the surface can actually increase friction, since more molecules are able to interact and bond, " Now I've been told friction is all "Inertial" on yahoo yet my book, "University Physics, with Modern Physics" by Young and Freedman says differently, as in the previous quotes...