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A cooling fan is turned off when it is running at 850 rpm. It turns 1350...

A cooling fan is turned off when it is running at 850 rpm. It turns 1350 revolutions before it comes to a stop. (a) What was the fan’s angular acceleration, assumed constant. (b) How long did it take the fan to come to a complete stop?

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Answer Given that 4.850 rpm =1350_revolutions (a) we know that Angular acceleration 2 .. WE Wort 200 O . &= to wor 20 60 (b) a = -(850x211 2x1500x20 +2=-0.42 raden we know that 0=wo tw)t t= 20 wotw +- 2x1500x27 850x t=211.76 Sec T feelScanned-with- CamScanner

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