sswilson wrote:
Neither (same as the what weighs more a lb of lead or a lb of feathers) but if each vehicle was travelling the same speed the 15" tires will have higher rpm.
So:
15" @ 2,000 RPM = 17" @ 2,000 RPM
Yet:
RPM @ X Speed 15" > RPM @ X Speed 17"
Sounds contradictory to me.
If you cut each tire so that the tred could be stretched out flat which one would be longer (ie. have the larger circumference)? Now if you multiplied the static RPM (in this case 2,000) by those lengths which one would cover more distance in the given time span (lets say 1 minute since it is RP
M)? If it covers more distance in the same amount of time wouldn't that mean it's traveling faster?
Not trying to be a prick or anything but all things kept equal, a larger platter circumference at a given RPM should be faster then one with a smaller circumference. One of the things a good disc defragmenting program will do is put commonly used files on closer to the edge of the platter so that it will get faster read/write times there. As you move towards the point of rotation however, the difference in speed between a smaller and larger circumference becomes less noticable until you theoretically reach the sorce and it becomes zero.