1. The problem statement, all variables and given/known data A car does 6.48E+4 J of work in traveling 2.92 km at constant speed. What was the average retarding force (from all sources) acting on the car? 22.2 N 2. Relevant equations F= w/d 3. The attempt at a solution F= w/d 6.48/ 2.92= 2.22 N ?