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

[填空题]
A cooling fan is turned off wc81 oauu*nwun y 4e1,7wr9 wwifg9k.jhen it is running at6-hygmen 4 e+n 850rev/min It turns 1500 revolutions before it co4em+nng -eyh6mes 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

参考答案:
空格1: -0.42±2%  空格2: 210±2% 


本题详细解析: