Lab 3 Friction done (Fall 2021)

Name: Lucero Puente INSTRUCTIONS: (1) Download this lab document and type out answers on the space provided for then save your answers. (2) If the spacing automatically moves, adjust so that your answers are not all over the place. (3) Upload this document, with your answers on it, on the designated Lab 7 Dropbox on Canvas Lab Reports/Module Tab. (4) If possible, ALL answers must be in green font or highlighted in yellow background with black font . This lab uses the Friction simulation from PhET Interactive Simulations at University of Colorado Boulder, under the CC-BY 4.0 license. Grading Policy for Lab Reports WITH Pre-/Post-lab Questions Grading Policy for Lab Reports WITHOUT Pre-/Post-lab Questions Completeness and accuracy of answers (with required screenshots) for the: 1. Warm-up and lab activities – 70% 2. Pre-/Post-lab questions – 10% 3. Conclusions and real-life applications – 20% Completeness and accuracy of answers (with required screenshots) for the: 1. Warm-up and lab activities – 80% 2. Conclusions & real-life applications – 20% Purposes/Objectives: In this lab, you will be able to: 1) describe a model (visual representation) for friction at the molecular level. 2) define friction in your own words. 3) determine the effects friction on rubbing surfaces then relate to motion of objects. Procedure: 1) Click the link below (hover mouse on the link then press at the same time: ctrl and left click ) https://phet.colorado.edu/sims/html/friction/latest/friction_en.html A. PhET Sim Introduction: The cursor movement could be more closely tied to the visuals. You can’t move the books. However, if you hover your mouse/cursor close to the arrows, the upper portion of the set-up moves. Click the cursor and move the arrows back and forth. Also, you can lower the upper portion of the set-up by dragging the cursor down lightly or hardly. B. Develop your understanding: 2) Rub your hands together and describe what you feel. Write your answers/observations below. When I start rubbing my hands together I start feeling warm from both hands where both hands are rubbing. Lab 7: Friction © 2020 by Orlando Patricio adapted from https://phet.colorado.edu/en/simulations/category/physics