When I was in Disney with my bff Grace we saw that many of the rides contained different aspects of physics. One of these rides was called rockin n roller coaster. It is a roller coasted that launches you from 0 to 60 in 2 seconds. It does this by using large magnets that allow the coaster to accelerate faster and stop faster. The opposite charges of the magnets help slow the coaster and as it is coming to a stop the size of the magnets increase because that means a strong pull between the opposite poles.