When David rolls it around like this, he's turning the sling around probably at six or seven revolutions per second, and that means that when the rock is released, it's going forward really fast, probably 35 meters per second.
Kada David to na ovaj način zavrti, on tu praćku vrti brzinom od vjerojatno 6 ili 7 okreta u sekundi. Znači da kamen, kad je otpušten, leti vrlo brzo, vjerojatno oko 35 metara u sekundi.