The National Football League specifies that all footballs must be Wilson brand. Wilson footballs are manufactured in Ada, Ohio, to very strict criteria. The tear strength of the interior bladder, made of urethane, is 192.2 kilonewtons per meter (kN/m). Convert this tear strength measurement into units of pound-force per inch (Ib,/in). E Click the icon to view the conversion table. Ib, The tear strength of the interior bladder is (Round your answer to the nearest whole number.) in More Info Length Force 1 m = 3.28 ft 1N = 0.225 Ib, 1 km = 0.621 mi 1 in = 2.54 cm 1 mi = 5280 ft 1 yd = 3 ft Print Done