Unit PEF Activity 1 In-Class Movies To show and then play a movie, click on the arrow or the movie title/description. Repeat to hide it. UPEF A1 Movie 1: Motion of two carts affected by slightly compressed spring UPEF A1 Movie 1: Motion of two carts affected by slightly compressed spring UPEF A1 Movie 2: Motion of two carts affected by spring compressed different amounts UPEF A1 Movie 2: Motion of two carts affected by spring compressed different amounts UPEF A1 Movie 3: Carts of different masses affected by compressed spring UPEF A1 Movie 3: Carts of different masses affected by compressed spring   Next Gen PET Student Resources Home Page Copyright © 2017 Next Gen PET