# Summative_Pulley_Lab_Guide.docx - LC3 Summative Task Pulley...

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LC3 Summative Task: Pulley Lab – What Influences Motion? To fully explain how forces affect the motion of objects, it’s necessary to demonstrate that you can acquire data, organize that data, and interpret the data. After all, Fnet=ma is about realtionships, both conceptual and mathematical, between three completely different things in the universe around us. How can pushes and pulls be related to a property of matter and a type of motion? This lab will challenge you to prove that those relationships exist. The very nature of a scientific law depends on its ability to be shown and supported with empirical evidence. In other words, you must be able to prove it with data, as you will do here. STEP 1: Launch Interactive: ejss_model_AtwoodMachine2wee/AtwoodMachine2wee_Simulation.xhtml Setting-Up the Interactive: Toolbar: At the top of the screen is a toolbar of controls for the interactive. Motion Graphs: Click the user dropdown menu, and change “world” to “both.” This will allow you to see both the model pulley system as well motion graphs as you conduct your investigation. You can also use the user menu to change the type of graph displayed. Adjusting Mass & Surface Friction : The mass of the system is controlled by using the mass sliders in the middle of the screen. Additionally, we will be using a frictionless surface for this investigation
Part 1: The effects of changing force on system of constant mass Procedures 1. Begin by using the mass sliders to “Added Mass = 0.25kg” and “Hanging Mass = 0.05kg”. This will make the total mass of the system 0.55 kilograms. The mass of the system will remain CONSTANT throughout Part 1 of this investigation (you may refer to the data table below).