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CBSE Class 11-science Answered

what is RPM.is it a unit of frequency or angular velocity. If a particle complete 1 revolution in 1 sec find both sec
Asked by udityashekhawat123 | 09 May, 2020, 12:26: AM
Expert Answer
RPM stands for revolutions per minute. It is used to calculate angular speed of a particle moviing in a circular motion.
If a particle completes one revolution in 1 sec then its angular speed is given by
omega equals fraction numerator 2 straight pi over denominator T end fraction
omega equals fraction numerator 2 straight pi over denominator 1 end fraction
omega equals 2 straight pi space rad divided by sec
or
straight omega equals fraction numerator 2 straight pi over denominator begin display style bevelled 1 over 60 end style end fraction
straight omega equals 120 straight pi space Revolution space per space minute
Since the particle completes 1 cyclw in 1 second 
so its frequency is
1z
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