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1.) A variable speed electric motor of radius 0.39 m is rotating at 122.1 rad/s. Suddenly,...

1.) A variable speed electric motor of radius 0.39 m is rotating at 122.1 rad/s. Suddenly, the motor uniformly slows to 91.0 rad/s as it makes 84 revolutions. What is the angular acceleration (in rad/s^2) of a point on the motor?

2.) A wheel with a 0.16 m radius is rotating at 17.0 rad/s. It then slows uniformly to 4.8 rad/s over a 2 s interval. What is the angular acceleration (in rad/s^2) of a point on the wheel?

3.)

A wheel with a 0.71 m radius is rotating at 16.0 rad/s. It then slows uniformly to 11.7 rad/s over a 8 s interval.

How many revolutions does it make during this time?

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