# Rotational speed

Object rotating around an axis is the number of turns of the object divided by time, specified as revolutions per minute (rpm), cycles per second (cps), radians per second (rad/s), etc.

- Rotational speed2 related topics

## Speed

Object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

Object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

Rotational speed (or angular speed) involves the number of revolutions per unit of time.

## Revolutions per minute

Number of turns in one minute.

Number of turns in one minute.

It is a unit of rotational speed or the frequency of rotation around a fixed axis.