Sorry 1 and 2 aren't filled in very well but I have absolutely no idea what to do for this question. My brain wasn't designed for physics :( 1. The problem statement, all variables and given/known data Question: A car travelling at 60.0 km/h has a total retarding force of 1500 N due to air resistance. If 1.00 L of petrol can release 40 000 000 J of energy, how many kilometres can the car travel at 60.0 km/h on 1.00 L of fuel (assume that the engine is 5% efficient)? 2. Relevant equations I really have no idea, but making a rough guess. . . s=ut+0.5at^2 or v^2=u^2 +2as 3. The attempt at a solution ????? Really, I have no idea where to start. Any help would be greatly appreciated!