Assertion: fastball's rate | /r/CapableOf | require to generate much force
Facets:
Source sentences:
text: However, the laws of aerodynamics tell us that for a baseball to physically rise (that is, curve upward) as it approaches the batter, the Magnus force would have to be greater than the weight of the ball, and the rate of spin required to generate this much force is far beyond the ability of any pitcher.