Why does water sometimes make things slipperier (e.g. hydroplaning) and other times make things “stickier” (e.g. putting socks on wet feet)?

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Hopefully the question is clear: basically, why is it that water on roads decreases friction, and water on a floor can make it easier to slip, but water droplets on feet make putting on socks harder?

In: Chemistry

5 Answers

Anonymous 0 Comments

It depends largely on the normal amount of friction. For road cars, generally there is a lot of friction between the tires and the road. If you stick a layer of water between them, there’s far less friction. With a dry sock and human skin, generally there’s not much friction; it’s enough to feel, but easy to overcome. When there’s a touch of water, the water tension kinda sucks the sock to your skin, giving it much more friction than normal. So it depends on how much friction is normal, and how much water you’re adding.

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