Challenge: some but not all of the gasoline used by car's enegine is transformed into kinetic energy. where might some of the energy go in this system?

Most of the excess energy is released as waste heat into the air surrounding the engine. Small amounts of excess energy are also released as sound energy, and as electrical energy generated by the alternator in a car's engine.

The masses of the objects and their densities

The answer would be a) -80of