How fast does a baseball travel ?
A hitter can add at least the same energy swinging a bat with two arms.
If the ball leaves the bat at 200 mph is that enough speed and energy to be a homerun?
How much velocity is required for a homerun in a typical ballpark?
How much speed is lost to friction with air?
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How does corking the bat improve its performance? Is the bat lighter or is the trampolene effect of the outer surface improved?