[填空题]
A cooling fan is turned zdn k.7ajv-8ooff when it is running at 85ty)cq1 j:bx. n0rev/min It turns 1500 revolutions befo j.xyn:cb)qt1re it comes to a stop.
(a) What was the fan’s angular acceleration, assumed constant? $\frac{rad}{s^2}$
(b) How long did it take the fan to come to a complete stop? s
