•  K'NEX PULLEYS

    ​Learning Objectives

    • Investigate the different types of simple machines and their real-world applications.
    • Learn how to use the Vernier LabQuest 2 and Dual Range Force Sensor. 
    • Experiment with several different pulley systems and draw conclusions about pulleys and mechanical advantage.
    • Relate discoveries about pulleys and mechanical advantage to real-world situations.
    • Document work using videos, photos, data tables and text.

    DIRECTIONS

    • ENGAGE: Ask your facilitator to show you how to use the Vernier Lab Quest 2.
    • We no longer have a working Dual Range sensor, so you will have to weigh objects using the scale. You will measure in grams. Be gentle with all of the items. 
    • Record the data from one of your forces using the Lab Quest 2. Record the MAX, MIN, and MEAN for the data set.
    • EXPLORE: Attach 10 washers to a piece of string. Use the scale to see how much they weigh and then convert it to Newtons. Make sure to record this data in a data table. Your data table will show the average Newtons for each of your pulleys as well. It is very important that you record your data!!!
    • Build the Fixed Pulley and attach 10 washers to the end.Use the scale to see how many Newtons of force are required to lift the washers. Make sure to record this data in a data table.
    • Modify the pulley to build the movable pulley and see how many Newtons of force are required to lift the washers. Make sure to record this data in a data table.
    • Modify the pulley to build the combination pulley and see how many Newtons of force are required to lift the washers. Make sure to record this data in a data table.
    • RESEARCH: Define mechanical advantage and explain how it relates to the equation WORK = FORCE  X DISTANCE or (W=Fd)
    • Research a few real-world examples of pulleys and how some use mechanical advantage to accomplish tasks and others do not. 
    • EXTEND: Build the block and tackle out KNEX. Use the scale to see to see how many Newtons of force are required to lift the washers with the block and tackle.
    • Make a pulley system that requires even less force to move the washers. Explain why this works in your PowerPoint.
    • Use your pulley models to make conclusions about pulleys and mechanical advantage. You may need to look online to get a better understanding of this process. 
    • FOUR C'S: In four bullet points explain your strengths and challenges within the 4 C's (21st Century Skills): Collaboration, Communication, Creativity, and Critical Thinking throughout the process of this engagement.
    • CONCLUSION: What have you learned throughout the process of this engagement?  What helpful advice would you give people who are doing this engagement?