# Friction in Physics

I've heard a lot of things about Friction like friction between solids, liquids and gases. Even practical applications like motion of objects (Like car moving on road), etc. involve friction. But, do we really need to concern about Friction. I mean, Is the presence of friction really important in practical life? I goggled through but, i can't understand the depth of it, as all are saying "This wouldn't happen & That wouldn't happen" without friction...

Answers differentiating presence and absence of friction would be appreciated...

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If there were no friction: $$\mbox{ }$$ 1. You couldn't walk. $$\mbox{ }$$ 2. Cars couldn't function $$\mbox{ }$$ 3. You would be blown away by the fan. –  Dimensio1n0 Jul 1 '13 at 11:53
In low friction $F_{S(max)}$ will have a low value, but it still will be there. Imagine a skater on ice. You still will need a bit of force to get her moving, just a little bit, but even less once she's moving.