Hook: provide students Small quiz to refresh students memory. Provide students clips about the roller coaster, discuss the potential energy and gravitational energy involve in roller coaster.
Action: Provide students a work sheet with roller coaster diagram and ask students to calculate the gravitational energy kinetic energy and total energy at different points. Then sketch the kinetic energy , potential energy and total energy vs height. explain the graphs and compare them. Explain how the graph would be different if heights change?
Debrief: Show students the animation of roller coaster and the kinetic energy and potential energy and total energy change in diagram. Ask students to write down the law of conservation of energy as exit card.
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