He's right. Due to my previous training I pretty much key into the metric units, so I completely ignored the other measurements. From what I remember Luis achieved something on the order of 3.62 Kilonewtons of force. When I run the conversion of newton to pound-force I got an answer of 813.81.
Now I am not a physic or mathmatical guru so I may have goofed something up. I will take a closer look at my figures when I get home and actually put pecil to paper on them.
Now a tennis ball sized rock depending on the particular density of the stone should weigh around 300-500 grams (10 to around 17 oz) yeah it should hit more solidly than that
Marc Adkins
slingbadger wrote on Dec 22
nd, 2008 at 3:18pm:
I just saw the same show Staffslingser saw and there is something wrong.
it mentioned David using a tennis ball sized rock, and that he and Goliath were 30 ft. from each other. (where they got this from, I don,t know) and that he hit Goliath with 16 ft.lbs of force.
Now, I'm about as mathematically inclined as a fencepost, but I know enough from my own research to know that's not right.
That would have had to have been one very light rock that was thrown. The average Roman glande was 1.5 oz, and it hit with a force of 52-58 ftlbs of force.. Even taking into consideration the fact that it was,nt as aerodynamic as a glande, a stone that large should have more force than 16 ftlbs to it.
At least they portrayed Goliath within the normal size range, and not 30 ft. tall or anything.