Fan speed rev/sec?
An electric fan is running on HIGH. After fan has been running for 1.1 minutes, the LOW button is pushed. The fan slows down to 85 rad/sec in 1.85 seconds. The blades of the fan have a diameter of 6.7 meters and their deceleration rate is 4.9 rad/sec2.
1)What was the initial angular speed of the fan in rev/sec?
- NCSLv 71 month agoFavorite Answer
ω = ω₀ + αt
85 rad/s = ω₀ - 4.9rad/s² * 1.85s
ω₀ = 94 rad/s = 15 rev/s
(after dividing by 2π)
Hope this helps!