Correction for the speed of a Curveball (baseball)
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How fast is 0.250 miles per minute?
It's about one-fifth as fast as a Curveball (baseball)
The speed of a Curveball (baseball) is about 1.30 miles per minute.
(a.k.a. hook, a.k.a. hammer, a.k.a. yakker) (major league average)
The average speed of major league curveball pitch is 1.20 miles per minute. In the 1940's, debate over whether there really was a curve in the curveball pitch was settled with the conclusion that the ball does curve; however, an optical illusion caused by the spin of the ball and the batter's perception of motion exaggerates the extent of the curve.