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which has less friction,rough surfaces,or smooth surfaces?​

Sagot :

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Answer:

This is often said to be due to friction, but there are two possibilities: movement, or no movement. Rough surfaces have more friction than smooth surfaces and liquids such as oil or water are sometimes used as lubricants to reduce the effect of friction. There is no mystery behind friction.

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Smooth surfaces

Rougher surfaces have more friction between them than smoother surfaces. That's why we put sand on icy sidewalks and roads. You can't slide as far across ice with shoes as you can on the blades of skates (see Figure below). The rougher surface of the soles of the shoes causes more friction and slows you down.

For more information: https://flexbooks.ck12.org/cbook/ck-12-middle-school-physical-science-flexbook-2.0/section/10.4/primary/lesson/friction-ms-ps

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