排风机的叶片每分钟转1500圈,故周期为:T=
=
s=0.04s;
叶片边缘质点的线速度:v=
=
=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.
60s |
1500 |
1 |
25 |
叶片边缘质点的线速度:v=
2πr |
T |
2×π×0.2m |
0.04s |
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.
60s |
1500 |
1 |
25 |
2πr |
T |
2×π×0.2m |
0.04s |