Unit 1 Activity 4: Friction To show and then play a movie, click on the arrow or the movie title/description. Repeat to hide it. Exploration #1, STEP 1: Cart given a quick shove with fan unit pushing opposite the motion. Exploration #1, STEP 1: Cart given a quick shove with fan unit pushing opposite the motion. Exploration #1, STEP 2: Cart given a quick shove with friction pad rubbing on the track. Exploration #1, STEP 2: Cart given a quick shove with friction pad rubbing on the track. Return to Unit 1 Resources Page Copyright © 2020 LEAP