I Guess We Have All heard Of Carpooling,

if not it is a practice where two or more people going to the same place,

instead of taking a separate vehicle each, all go in one vehicle, saving fuel, wear and tear on the unused vehicles, not to mention saving the planet, as less pollution is made, although the engine of the pool car has to work harder to move the extra passengers,

and here is a point in case, how much harder did this engine have to work to move all of the passengers in it?