Yo-Yo Energy Return

The yo-yo trades height for spin and back again. Ask students to predict what will happen. Drop and return the yo-yo while students watch the spin. Key idea: Gravitational energy becomes rotational kinetic energy and then returns. Ask: Where does the falling energy go? Safety and cleanup: Teacher demo; clear space. https://www.google.com/search?q=%22Yo-Yo%20Energy%20Return%22%20science%20demonstration%20experiment