https://www.youtube.com/watch?v=6IQ15ymhR2M This clip from the history channel as is titled, attempts to address the likelihood of David killing Goliath with a sling. As you can see in the video, the pro Slinger when testing the force on a load cell, got a reading of 3.62 kN or 3620 N. Unless I'm completely butchering this would be simple calculation (which wouldn't surprise me)...if the force is 3620 N, and we assume the sling stone used is 1 kg, wouldn't the final acceleration come out to be 3620 Meters/Sec^2? That seems awfully high...(though I would assume it decelerates very quickly over a greater distance) Keep in mind that I'm trying to be conservative here by giving that small stone a much greater mass than it should have, to come out with a lower speed. Afterall, a baseball which is much larger than that stone, only has a mass of 0.145 kg. Anyway, is the acceleration right or wrong? Because what I'm getting is really hard to believe.