Question:

How to get the marble back to the top?

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I am making a roller coaster from scratch and the teacher requires that i make it go around two time. Once i make it go around once the ball will end up at the bottom and i have no ideal how to get the marble back to the top then onto the track again. We are required to use natural forces but if not then fine. Do you have an ideal on what I can do?

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  1. use air, probably a balloon at the right spot. right spot meaning where you need to have it gain speed to finish the course

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