Bat Swing Speed and Batted Ball Velocity

01-11-2014 / By: X Bats

Bat Swing Speed Batted Ball Velocity

20.5mph (9.2m/s)

62.0mph (27.7m/s)

27.3mph (12.1m/s)

68.8mph (30.7m/s)

34.3mph (15.3m/s)

76.2mph (34.0m/s)

41.0mph (18.3m/s)

83.8mph (37.4m/s)

47.9mph (21.4m/s)

91.4mph (40.8m/s)

A similar experiment (from the same 1980 high-school textbook Physics of Sports developed by Florida State University[6]) changed the bat swing speed while the the ball mass, pitch speed, and bat mass (30oz) were all kept constant. The data shows that a faster bat swing produces a faster batted ball speed. Doubling the swing speed of the bat results in an increase of almost 22mph. So, it would seem that swinging the same bat faster is more beneficial than swinging a heavier bat at a the same speed. Ideally, the best result would be to swing a heavier bat faster. But, as I already stated, it is harder to swing a heavier bat with the same speed, let alone swing a heavier bat faster.

So, it looks like we have two different effects (increasing bat weight and increasing bat swing speed) which both result in faster batted ball speeds. However, it does not seem possible to get both effects at the same time. In fact, increasing bat weight might decrease bat swing speed. So, we need to see how these two parameters are related before we can answer the question "what is the final batted ball speed?"



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