Teacher Cart

teacher cart
Rollercoaster science project?

I have to build a model rollercoaster for my 8th grade science project, but i need to make the cart move by itself using a hydraulic system. My teacher said i could use a syringe attached to another one with a tube filled with water, which when you put pressure on one syringe, the end of the other one pushes out. I’ve decided to use this to get the cart going, but i’m not sure how i will keep it moving throughout the whole rollercoaster by itself. Does anyone have any ideas? (using a hydraulic system, in other words a system that uses water to make pressure.) thx

well…i dont see what would be wrong with just starting it off and then letting it go…but….oh, and a hydraulic system is one that creates pressure difference by using ANY liquid, not just water.
But, neways….what about a sort of “water rocket” stuck to the back of the cart? That would be cool.And it would be very easy to add it into a hydraulic system.

OR, you could get an oil hydraulic cylinder (like the ones on a car that hold up the hatchback or hood) and use it to push the cart at the beginning. It would create a much greater force at the beginning. Just have it fully compressed and have a lever holding it in place, then remove the lever and watch it go.
Good Luck!