A note on the Amazon ads: I've chosen to display current events titles in the Amazon box. Unfortunately, Amazon appears to promote a disproportionate number of angry-left books. I have no power over it at this time. Rest assured, I'm still a conservative.
Sunday, December 12, 2004 Someone explain this to me: I'm watching ESPN's Sunday Night Football game and they have that "Pass Track" video/graphic. It shows that a pass thrown by Donovan McNabb (which was intercepted) was travelling at 60 mph. Analyst Joe Theisman then says that 60 mph football toss is equivalent to a 101 mph baseball pitch.
I don't get it. Is he saying that the passer's arm strength is equivalent to Randy Johnson throwing a 101 mph fastball? If anyone could enlighten me I'd appreciate it.
Because of the mass of a football, it requires more force. Thus, the force exerted by McNabb is the same amount of force (exerted in Newtons) as Johnson.
In terms of kinetic energy, I think Joe's pretty close to correct. A baseball weighs 5-5.25 oz, a football weighs 14-15 oz. That's a ratio of about 2.8 in favor of the football. Kinetic energy goes as the velocity squared, so to get the same "zip" on a baseball, it has to have about 1.7 (square root of 2.8) times the velocity as a football. 60 times 1.7 equals 102.
It's pretty shocking to have an ex-jock get physics right on National TV. Someone call the FCC!