Homework Help: Physics

Posted by Renee on Saturday, February 5, 2011 at 11:57am.

A coin is placed on a record that is rotating at 45 rpm. If the coefficient of static friction between the coin and the record is 0.2, how far from the center of the record can the coin be placed without having it slip off?

Physics - bobpursley, Saturday, February 5, 2011 at 1:18pm
.2(mg)=m w^2 r

change 45rpm to rad/sec
solve for r.

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