A coin rests 12.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.440. The turntable starts from rest at  t = 0  and rotates with a constant angular acceleration of 0.640 rad/s2. (a) Once the turntable starts to rotate, what force causes the centripetal acceleration when the coin is stationary relative to the turntable? Under what condition does the coin begin to move relative to the turntable?   (b) After what period of time will the coin start to slip on the turntable?

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter10: Fixed-axis Rotation
Section: Chapter Questions
Problem 48P: An ultracentrifuge accelerates from to 100,000 rpm in 2.00 min. (a) What is the average angular...
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A coin rests 12.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.440. The turntable starts from rest at 

t = 0

 and rotates with a constant angular acceleration of 0.640 rad/s2.

(a) Once the turntable starts to rotate, what force causes the centripetal acceleration when the coin is stationary relative to the turntable? Under what condition does the coin begin to move relative to the turntable?
 
(b) After what period of time will the coin start to slip on the turntable?
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