5/10/2012 · Step 1: Based on given load we can determine the load per wheel “W”. W = 4800 lbs/4 (wheels) = 1200 lbs on each wheel. Step 2: From the provided table find coefficient of rolling resistance “f”. f = 0.047 (in.) [Note: Polyurethane has a range of coefficient values, depending on the specific material selected.]