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posted by  SDS on 11/6/2009 10:25:11 AM  |  status: Closed  |  Earned Karma: 0

Rotational Kinematics

Course Textbook Chapter Problem Needs by
General Physics Physics (8th) by Cutnell, Johnson 8 N/A 11/6/2009 at 4:00:00 PM
Question Details:
A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration of 0.180 rad/s2. After making 2876 revolutions, its angular speed is 140 rad/s.
(a) What is the initial angular velocity of the turbine?

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posted by Physics-Ga on 11/6/2009 8:07:58 PM  |  status: Live
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Response Details:
2 α θ = ωf2 -  ω02    the angular equation equivalent to the linear equation
θ = 2 π * 2876 = 1.807 * 10E4 rad
2 α θ = 6505 rad
ω02 =  ωf2  - 2 α θ = 1310
ω0 = 114 rad / sec
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