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How do rollercoasters keep moving?

Two short videos put the topics of energy and motion and forces in a real-life context: How does a rollercoaster get to the top of the ride? covers the curriculum topic of work done. Students learn that engineers need to calculate the work done needed to raise the rollercoaster cars to the top of the ride, as this is one of the things they have to know to work out how powerful a motor the ride will need.  How do rollercoasters keep moving? looks at the topic of energy changes and transfers. Students learn that engineers need to use a motor to raise rollercoaster cars high enough on t...