Assuming speed at the point of release is 60 mph and assuming no loss of speed, there will be about 1/100th second difference in travel time to the plate. The ball is traveling at 88 feet per second. However, the ball will lose approximately 1 mph of speed for each 7 feet of travel so the pitch released from 36 feet will be going slightly slower when it crosses the plate - in theory, 55 mph versus 54.86 mph.
The physics of it all are pretty complicated to say the least. The article below explains it.
http://0314c3a.netsolhost.com/wordpress1/wp-content/uploads/2012/05/BALL-SPEED-SLOW.pdf
That number is from baseball. It is not a valid constant for a pitcher who is spins the ball fairly well (> 20rps) much less an elite pitcher that is above 30 approaching 40rps. For example you will see a significant difference between a faux rise (bulletspin) and a legit rise.
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