Just trying to keep it up, bored at the moment
Revolutions per minute (abbreviated rpm, RPM, r/min, or r·min−1) is a unit of frequency of rotation: the number of full rotations completed in one minute around a fixed axis. It is used as a measure of rotational speed of a mechanical component.
Standards organizations generally recommend the symbol r/min, which is more consistent with the general use of unit symbols. This is not enforced as an international standard. In French for example, tr/mn (tours par minute) is commonly used, and the German unit reads U/min (Umdrehungen pro Minute) or 1/min (= 1 min-1).
The corresponding unit in the International System of Units (SI) is hertz (symbol Hz) or s-1 (1/second). Revolutions per minute is converted to hertz through division by 60. Conversion from hertz to rpm is by multiplication by 60.
1 rpm = 1/min = 1/(60s) = 1/60 Hertz ≈ 0.01667 Hz
Another related unit is the SI unit for angular velocity, radian per second (rad·s−1):
1 rpm = 2π****rad·min−1 = 2π/60 rad·s−1 ≈ 0.10471976 rad·s−1
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Originally Posted by Lobo1186
interesting... so how do you denote 1 RPM? seeing as you would not have agreement if the R stands for Revolutions. (note ending in s)
is it 1 R-sPM? (if in fact a small s does denote the plural of the word imediately before as you insinuate in your post)
then it should be RsPM? but if you say that it is not the case then the OP saying RPMs would be correct since it would be the same as (RPM)s making it plural of more than one Rotation Per Minute...
(im just ****************ing around btw thought its a funny concept. no harm meant) :dance:
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Monica
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