Friction is related to speed. This makes things very complicated, because friction changes the speed and the speed change the friction. This lead to differential equations such as:

3y' + 5y = cos(x), solve for y, and it can't be in terms of y'.

And that's a simple one! The problem with equations like this is it takes a full understanding of integrals and derivatives to solve (basic calculus). This is why they aren't taught at a high school level. But as soon as you get the advanced math, physics becomes frighteningly accurate (as well as difficult).

]]>Don't get me started on Physics...(ignore air resistance and friction, my eye. Teach me something I can actually use, and then I might be interested.)

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