# physic

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A 69-cm-diameter wheel accelerates uniformly about its center from 150rpm to 320rpm in 4.4s . Determine angular acceleration?

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change in rpm = 170

170 rev/min *1 min/60 s * 2 pi radians/rev = 17.8 radians/second change
which is delta omega

alpha = change in omega/ change in time

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