A typical gasoline-powered car stops by braking. Friction in the brakes brings the car to rest by transforming kinetic energy to thermal energy. Electric vehicles often stop by using regenerative braking, with the engine used as a generator, transforming the kinetic energy of the vehicle into electric energy that recharges the battery. The energy is thus ultimately transformed to chemical energy in the battery.
Which type of stopping involves a larger change in entropy? Which vehicle is apt to be more efficient? Explain, using energy and entropy concepts.