Problem 10.22 A centrifuge is a common laboratory instrument that separates comp

Question

Problem 10.22

A centrifuge is a common laboratory instrument that separates components of differing densities in solution. This is accomplished by spinning a sample around in a circle with a large angular speed. Suppose that after a centrifuge in a medical laboratory is turned off, it continues to rotate with a constant angular deceleration for 10.6s before coming to rest.

Part A

If its initial angular speed was 3900rpm , what is the magnitude of its angular deceleration?

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Part B

How many revolutions did the centrifuge complete after being turned off?

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Explanation / Answer

Angular speed = 3900 rpm=3900/60=65 rev/s
A)=>Anugler retardation=65 /10.6 = 6.13 rev/s^2

B)No of revolution of centrfugal pump before coming to rest
=65 x 10.6 = 689

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