The linear speed:

Where:

- Linear speed
- Distance travelled
- Time (in which the distance is travelled)

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Angular speed:

Where:

- = Linear speed
- = Radius
- = Angular speed (In radian)

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The Difference:

Linear velocity is a change of speed in a straight line. Angular speed is the rate of change of angle with respect to time. These two are convertible in a case of a circle motion. In a circle, across a tangent, linear speed can be measured and across the arc traveled, angular speed can be measured.