Question
A coin is placed 16.58 cm from the axis of a turntable of variable speed. The...
A coin is placed 16.58 cm from the axis of a turntable of
variable speed. The coefficient of static friction between the coin
and the turntable is 0.17. The speed of the turntable is
slowly
increased. At what speed (in rpm) does the coin start to slip?
Homework Answers
Answer #1
The maximum force due to static friction is
And the force due to the centrifugal force is
At the critical condition when the coin starts to slip the two forces are equal. i.e
Putting the values in SI units
Converting it to RPM we get
So, the final answer is 30.27 RPM.
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