When I was in high school, I came up with an ingenious idea for travelling without fuel. While everyone was thinking about what changes they could make in the vehicle (like solar powered, water powered, etc) I chose to think out of the box (mostly because the other options were too technical 😛 )- I thought if we could make roads like below, we might be able to travel without fuel!
When a vehicle just starts to go down, its slow. But very soon, if it keeps going down, it picks up a lot of momentum and travels very fast – you don’t even have to start the engine! If you leave it uncontrolled (without applying brakes), the vehicle could speed up amazingly.
So, I thought, why not apply this principle to plains as well? In my above diagram, (where roads are constructed as shown by the black lines), if a car (without starting its engine) starts from point x1, it would move by itself till the point x2. It would also gain a lot of momentum, if the distance is considerable. Now, when it reaches x2, there needs to be a relatively steep slope going upwards. The car now uses the momentum it has gained in the downward journey and goes up automatically and reaches the point x3. Then again, there is a downward (long) slope, and again an upward (steep) slope…
The car (or any other vehicle) might travel like this without ever switching on its engine! Of course, there are lot of calculations to be made as to what is the best distance, what is the best degree of slope etc, but those small things could be calculated by the physicists and mathematicians. Its the concept which is more important! Back then, I was expecting a Nobel prize in physics for this. I still do 😀
What do you people think?
PS: There is another concept that I conceptualized (during my high school) to make an internal combustion engine work with two different sizes of stones (without petrol or diesel). But that I am not going to share 😛