gc textbook chapter 8 Rotational Motion (id: 7c508dc5b)

[填空题]
A cooling fan is turned38jv fw+tw 7e, 1bp phuphs7l.- osai3 off when it is running at 850q (mz5k:gisj0 rev/min It turns 1500 revolutions before it comes to a sto gzmi(q5sj:k0 p.
(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

参考答案:
空格1: -0.42±2%  空格2: 210±2% 


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