A centrifuge is a common laboratory instrument that separates components of diff

Question

A centrifuge is a common laboratory instrument that separates components of differing densities. This is accomplished by spinning a sample around in a circle with a large angular speed. Suppose that after a centrifuge in a medical lab is turned off, it continues to rotate with a constant angular deceleration for 10.0 seconds before coming to rest.

If its initial angular speed was 3840rpm, what is the magnitude of its angular deceleration and how many revolutions did the centrifuge complete after being turned off?
Part one is in rev/sec

Explanation / Answer

= 3840 rpm = 64 rps

t= 10 ec

= ( 0 - 64)/10 =- 6.4 rev/s^2

no. of complete revolutions;

0^2 - 64^2 = 2(-6.4)()

= 320 radians =

no. of revolutions= 320/ 2= 51 apprx ( no. of revolutions)

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