UL-SG-B 12-gauge 00 lead buckshot (12 pellets) 650 grains (42 grams) 1200 fps (366 m/s) 2074.8 ft⋅lb (2813.1 J) Note: There is no hierarchy of threat severity in this list.FAQsWhy was UL 752 revised? UL Standards & Engagement received input that ballistic threats have changed. ...
Terminal velocity is the term for the speed an object reaches when the force of drag, or air resistance, pushing against it is equal to the force of gravity pulling it down. An object dropped from a height will initially accelerate because of gravity. The atmosphere, however, exerts an oppo...