(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A coin is placed 18cm from the axis of a rotating turntable of variable speeds. If the coefficient of friction is 0.68, what is the maximum r.p.m that the coin can handle before sliding off?

2. Relevant equations

This is basically what I need..

I know there's mv^2/r

But which equation do I need for RPM questions?

3. The attempt at a solution

None at the moment, not sure of the equation I'm supposed to use :S

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# Homework Help: Centripetal Force (RPM Question!)

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