# phy

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 0.130 rad/s2. After making 2844 revolutions, its angular speed is 136 rad/s. (a) What is the initial angular velocity of the turbine? (b) How much time elapses while the turbine is speeding up?

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1. d = 2844rev * 6.28rad/rev = 17,860 radians.

a. V^2 = Vo^2 + 2a*d.
V = 136 rad/s, a = 0.130 rad/s, Vo = ?.

b. V = Vo + a*t. V = 136 rad/s, a = 0.130 rad/s^2, t = ?.

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posted by Henry

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