Awheel starts from rest and rotates with constant angular acceleration to reach an angular speed of 11.1 rad/s in 2.99 s.(a) find the magnitude of the angular acceleration of the wheel.

The angular acceleration of a rotating object is given by

where
is the final angular speed of the object
is its initial angular speed
is the time taken to accelerate

For the wheel in our problem, ,  and , so its angular acceleration is

That would be kinetic energy

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