A car does 8.0 ✕ 104 J of work in traveling 2.7 km at constant speed. What was the average retarding force (from all sources) acting on the car?

Answer 1

sorry 8.0*10^4 J of work

Answer 2

Force * 2700 meters = 80,000 Joules

Force = 80/2.7 Newtons