english: 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.
non_english: Kada David ovako zavrti praćkom, okreće je verovatno šest ili sedam puta u sekundi što znači da, kada otpusti kamen, on će leteti unapred velikom brzinom, verovatno oko 35 m/s.