airplane propeller

2012-10-25 3:39 am

An airplane propeller is rotating at 2000 rev/min .

Compute the propeller's angular velocity in rad/s.

How long in seconds does it take for the propeller to turn through 39 degree?

更新1:

the propeller's angular velocity in rad/s. is 209 rad/s. How long in seconds does it take for the propeller to turn through 39 degree?

回答 (1)

天同

2012-10-30 12:30 am

✔ 最佳答案

Angular speed = 2000 x 2.pi/60 s^-1 = 209 s^-1

39 degrees = 39.pi/180 radians = 0.6807 radians
Time taken = 0.6807/209 s = 3.26x10^-3 s

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