1. We only changed a few things from the original design. We added a tube that would catch the marble and launch it into our pulley system, and we also took off the part where the marble would fall from the top of the machine into a catapult at the bottom, because that part was too unpredictable and inconsistent.
2. Up to this point, we had trouble getting the machine to be consistent enough to present. We had to fix the parts in place with zip ties in order to get the same result from the machine every time the marble went through.
3. We use friction in our machine in order to slow the marble down and waste time, and we use our knowledge of inertia in order to slow the ball down enough to change its direction on the zig-zagged tracks.
Alex Luzarraga, Brendan Lyden, Marco Navarro, Hugo Scala
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