co-efficiant of friction

tony mcscaff | 20:07 Mon 07th Aug 2006 | Science

6 Answers

what two substances have the lowest co-efficiant of friction

Center of the earth

Feeling uncomfortable at 37 c. even though your body temperature is the same

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Peter Pedant

gases have very low coefficients

a dry ice puck slides over the ice like nobody's business.

Ice on ice and water at 0'C is pretty good

I think I am missing the point

PP

tony mcscaff

Question Author

thanks for the answer peter pedant ,it was a freind of mine who asked me because he did not believe the answerbank would give it I,m glad you proved him wrong

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JudgeJ

It cannot be quite zero, Eddie. The coefficient of (static) friction is the ratio between the force of material one upon material two (usually its mass) and the force required to move material one in relation to material two. If the coefficient were zero it would mean that no force was required to move a block of wet ice which was resting on top of a sheet of wet ice. Clearly this is not so. Although the coefficient is very low, it must be a positive number.

Hamish

Possibly superfluid helium on solid helium then?? Sf He has zero viscosity and 'climbs' out of vessels - bit academic though at about 3K

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