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Revolutions per minute

From Wikipedia, the free encyclopedia

Revolution per minute
Unit ofRotational speed
Symbolrpm or r/min 
Conversions
1 rpm in ...... is equal to ...
   SI angular speed   /60 rad/s ≈ 0.1047198 rad/s
   SI frequency   1/60 Hz ≈ 0.01666667 Hz
   SI derived rotational frequency   
   SI derived rotational speed   

Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is the number of turns in one minute. It is a unit of rotational speed or the frequency of rotation around a fixed axis.

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  • ✪ What is an RPM?
  • ✪ Angular & Linear Speed of a Circle / Wheel Given RPM and Radius Trig & Precalculus
  • ✪ Linear Speed and Angular Velocity

Transcription

Contents

International System of Units

According to the International System of Units (SI), rpm is not a unit. This is because the word revolution is a semantic annotation rather than a unit. The annotation is instead done as a subscript of the formula sign if needed. Because of the measured physical quantity, the formula sign has to be f for (rotational) frequency and ω or Ω for angular velocity. The corresponding basic SI derived unit is s−1 or Hz. When measuring angular speed, the unit radians per second is used.

This page was last edited on 26 April 2019, at 09:00
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