In this lesson, we are going to introduce the students to the idea of friction. The main idea is that, friction change the kinetic energy into other forms of energy usually heat or sound. We are going to explore the idea with 3 activities: 1. Pendulums, we are going to demonstrate how frictions affect the performance of pendulums; 2. Frictional Surface of Different Materials, we are going to test the friction of different surface by rubbing towel on them; 3. Beach Balls, pumped up vs not.
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