Rotational speed

Rotational speed (or speed of revolution) of an 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 speed (or speed of revolution) of an 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.. The symbol for rotational speed is ω cyc {displaystyle omega _{ ext{cyc}}} (the Greek lowercase letter 'omega'). Tangential speed v, rotational speed ω cyc {displaystyle omega _{ ext{cyc}}} , and radial distance r, are related by the following equation: