Question

A coin is placed 26 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 120 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980 cm/s
2.
What is the coeﬃcient of static friction between the coin and the turntable?

Sep 25, 2012