Question

A 140 g coin sits on a horizontally rotating
turntable. The turntable makes one revolution each 2 s. The coin is located 12 cm from
the axis of rotation of the turntable.
The acceleration of gravity is 9.81 m/s
What is the frictional force acting on the
coin?
Answer in units of N.
The coin will slide off the turntable if it is
located more than 28 cm from the axis of
rotation.
What is the coefficient of static friction?

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