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How fast am I going?
If I take a 1" spindle on a circular saw which rotates (very slowly I admit) once a second, then any point on it moves Pi x D inches per second.
Stick a 9" blade on it and the tip of any tooth moves 9 x Pi
inches.
So, if I am standing on the earth and am 6 feet tall, is my head travelling a lot faster then my feet?
1 Answer
- billrussell42Lv 72 months agoFavorite Answer
yes, by a tiny amount.
radius of earth is 6.37e6 meters
if your head is 2 m above your feet, the change in speed is:
2/6.37e6 = 0.00000031 or 0.000031 %
if your feet is moving at exactly 1,000 miles per hour, you head would be moving 1000.00031 mph.