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I need help with this question related to rotational dynamics, torque, etc. Question #2

2. A fan blade has a radius of 0.50 meters, and a rotational inertia of 0.60 kg m?. The fan blade
starts from rest, and reaches an angular speed of 20.0 radians/second in 1.2 seconds.
a. What is the angular acceleration of the fan blade?
b. What was the torque supplied by the motor of the fan?

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