Using the concept of push-back toy car in a real car to save fuel
The wastage of fuel in a traffic jam is significant for any car.Often the traffic moves at snail's pace and we have to put the car on driving slowly for quite a time for a short distance.
What if we can actually drive the car for a mile or two even if the engine is off?
This is where the concept of rewinding comes in,The toy car is winded back and goes forward and when stopped it pauses and then it goes forward again when left.
we may actually use this concept in a real car so that when the car moves on engine power it is also wound back.So when there is a traffic jam the engine is off and the movement is done by the unwinding thus saving fuel!