The angular speed simply describes the way that things turn which is described in units such as revolutions per minutes, degree per seconds, etc.
Your information is incomplete as the diagram isn't provided. Therefore, an overview will be given.
It should be noted that angular speed simply means the measure of how fast the central angle of the rotating body changes with respect to time.
The angular speed is simply calculated by multiplying the angle of rotation and the time taken to complete the rotation.
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