I share this objection. If you want to get even crazier, what about fuel economy? Using miles per gallon (or km/l) can also be simplified to reciprocal area, s

I share this objection. If you want to get even crazier, what about fuel economy? Using miles per gallon (or km/l) can also be simplified to reciprocal area, so 40 mpg is just 1.7e7 m^-2. For an electric car you can change 250 miles per 100 kWh to the more perfect representation 0.001 s^2 /(kg m).