RPM stands for revolutions per minute. It is used in circular motion to describe the number of revolutions or rotations completed by an object around an axis in the interval. At amusement parks and carnivals, the RPM of rides such as Ferris wheels, tilt-a-whirls and merry-go-rounds is controlled so that the riders do not move too fast or too slow. The frequency describes the time it takes to complete a revolution. Its unit is a hertz, which is one revolution per second. Hertz is commonly abbreviated as Hz. To convert RPM to Hz, it is necessary to convert minutes to seconds.

- Skill level:
- Moderate

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## Instructions

- 1
Study the definition of a hertz. A hertz is one oscillation or revolution per second. Revolution is dimensionless and is abbreviated as rev, while second is abbreviated as s, so that 1 Hz = 1 rev/s.

- 2
Examine the equation to convert from RPM to Hz, which entails converting minutes to seconds. There are 60 seconds in a minute. Therefore, 1 RPM is 1 rev/min = (1 rev/min)(1 min/ 60 s) = 1 rev /60 s. This equation means that to in order to convert RPM to Hz, simply divide by 60.

- 3
Convert 3600 RPM to Hz. The answer is 60 Hz. This is because 3600rpm = (3600 rev/min) (1 min/60 s) = 3600 rev/60 s = 60 rev/s = 60 hertz. Most often, rev is not explicitly written since it is not a unit.