Consider a small object at 3.72cm from the axis of a phonograph turntable that operates at 22.8 rev/min .
a) Assuming the object does not slip, what is its acceleration in cm/s^2?
b) What is the minimum coefficient of friction between the object and the turntable ?
c) Suppose that the turntable achieved its angular speed by starting from rest and undergoing a constant angular acceleration for 0.345s. Calculate the minimum coefficient of static friction required for the object not to slip during the startup period.