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PJ81
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Homework Statement
A coin is placed on a record turntable at a distance of 10cm from the turntable axis. The coefficient of static friction between the coin and the turntable is 0.21. If the turntable starts from rest with a constant angular acceleration of 1.2 rad/s2, how much time passes before the coin begins to slip?
Homework Equations
Ff= coefficient of friction x Radius
The Attempt at a Solution
Ff= 0.21 x 0.1 = 0.021Nm
Am I on the right track? where to from here,I can't find any examples in my textbook to help me any input would be appreciated