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OpenStudy (anonymous):

If frictional force F=µR. Then µ=F/R = ma/mg = a/g. So, coefficient of friction is proportional to acceleration. But if the acceleration of a body increases, then the coefficient of friction should decrease right?

OpenStudy (anonymous):

µ=F/R this is right, but R shouldn't be always mg.And do you know limiting friction? Let me know u are taking about static of kinetic. a/g= µ they are directly proportion.

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