培训啦认证
排风机的叶片每分钟转1500圈,故周期为:T=
60s
1500
=
1
25
s=0.04s;叶片边缘质点的线速度:v=
2πr
T
2×π×0.2m
0.04s
=10πm/s=31.4m/s;答:叶片运动的周期是0.04s;叶片边缘质点的线速度是31.4m/s.