Rational numbers and real numbers
Posted: Wed Jul 18, 2007 9:32 am
When we deal with speeds, they are ratios of counting numbers, which means they are all rational numbers. This would be fractions of the kind 1/2, 2/5, 3/4, 7/6 etc...
When we plot this on the REAL number line, we get a number of gaps, left by the irrational numbers. Technically, there is no way we can get a speed of pi.
However, when we deal with the motion's representation, we say that they are shown as (x,y,z,t) or (s, tx, ty, tz) for the two alternative systems (spatial and temporal reference systems). These numbers are taken to be real, or even complex, both of which are continuous, and not discretized. Neither the ratio of two quantities, nor the quantities themselves, are really real!
So what about the irrationals?
Gopi
When we plot this on the REAL number line, we get a number of gaps, left by the irrational numbers. Technically, there is no way we can get a speed of pi.
However, when we deal with the motion's representation, we say that they are shown as (x,y,z,t) or (s, tx, ty, tz) for the two alternative systems (spatial and temporal reference systems). These numbers are taken to be real, or even complex, both of which are continuous, and not discretized. Neither the ratio of two quantities, nor the quantities themselves, are really real!
So what about the irrationals?
Gopi