Unit 8 Activity 3: Energy in Gravitational Interactions To show and then play a movie, click on the arrow or the movie title/description. Repeat to hide it. Exploration #2, STEPs 2 & 3: Simulation of Skateboarder. Exploration #2, STEPs 2 & 3: Simulation of Skateboarder. You should be able to run this yourself! Click on the image below and follow the instructions in the activity. This simulator is one of many developed by the Physics Education Technology (PhET) group at the University of Colorado at Boulder. Exploration #2, STEP 5: Simulation of falling object, with KE and GPE graphs. Exploration #2, STEP 5: Simulation of falling object, with KE and GPE graphs. Return to Unit 8 Resources Page Copyright © 2020 LEAP