1) A centrifuge is a common laboratory instrument that separates components of d

Question

1) 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 11.8 s before coming to rest. If its initial angular speed was 3819 rpm, what is the magnitude of its angular deceleration? Give answer in rev/s2.

How many revolutions did the centrifuge complete after being turned off? Do not enter unit.

Explanation / Answer

Angular speed = 3819 rpm = 3819/60 = 63.65 rev/s

A) Anugler deceleration = 63.65/11.8 = 5.39 rev/s^2

B) No of revolution of centrfugal pump before coming to rest
    =63.65 x 11.8 = 751.07

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