Unit 1 Activity 2: Interactions and Force To show and then play a movie, click on the arrow or the movie title/description. Repeat to hide it. Exploration #1, STEP 1: Low-friction cart being given successive pushes. Exploration #1, STEP 1: Low-friction cart being given successive pushes. Exploration #1, STEP 2: Measuring the speed of, and force pushing on, the cart in the previous movie. Exploration #1, STEP 2: Measuring the speed of, and force pushing on, the cart in the previous movie. Exploration #2, STEP 1: Forces and Motion Simulator. Exploration #2, STEP 1: Forces and Motion Simulator. 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. Return to Unit 1 Resources Page Copyright © 2020 LEAP