_ - I . u ""'I_'"D' .---..-_.-.. _-_- Overview: In this lab you will perform several experiments with your Sensor Cart and an inclined surface. You will be using Vernier's Video Analysis tool to analyze videos that you record. You will compare your Vernier Video Analysis (WA) analysis to an analyses in Excel, Graphical Analysis, and theory. This week also features the term's first Discovery Experiment. These experiments allow you to use your own ideas and materials to complete a given task. As this will be your first Discovery Experiment, more guidance has been provided; future Discovery Experiments will require you to develop more of the procedure on your own. Experimental design and documentation are important skills that you will use in your future courses and career. Background: Each piece of software that we use to analyze data has its advantages and disadvantages. Graphical Analysis can easily record, plot, and fit data, but does not let you finely control those processes. Excel requires more work to make plots and fits, but gives you far more control over doing that. Comparing data in several formats is beneficial because it allows you to validate your findings and allows you to explore the unique features of each program. This week's lab will introduce you to another software that can be used to record, plot, and fit data. Learning Objectives: After completing this lab, students will be able to: ' Acquire motion data from the Sensor Cart with Vernier Video Analysis (1.c, 4a, 4b) ' Analyze motion data in Vernier Video Analysis (2.a, 2.d) ' Compare data analysis in Graphical Analysis, Excel, Vernier Video Analyis, and theory [2.b) ' Design an experiment to explore and analyze constant and non-constant acceleration (1, 2) Equipment checklist: Sensor Cart Level Surface inclined Plane Camera (a phone camera will work) A cable to connect your camera/phone to your computer xssxa PC.Q1: How do your calculated velocity and calculated acceleration graphs compare to the experimentally determined values in Graphical Analysis? PC.Q2: Once you are no longer pushing the cart, what kind of motion is the cart undergoing? There may be more than 1 correct answer. PC.03: What is the magnitude of the acceleration? CHEESE Constant position Constant velocity Constant acceleration Position that changes quadratically respect to time Velocity that changes linearly with respect to time Acceleration that can be modeled with a function of the form y = m*x+ b Part D: Analyze the incline video recording using Vernier Video Analysis PD.F1: Take a screenshot of your position and velocity graphs from VVA and place it into your lab notebook. ? PD.Q1: How would you get an estimate for the magnitude of the acceleration using the plots generated by VVA? ? PD.Q2: How can you determine the angle of the incline? What is that angle? ? PD.Q3: Next time you capture a video for analysis, what steps do you want to take to make the analysis of the video easier?_-' Part A: Pre-lab Reflection '_? What aspect of this lab do you expect to be most challenging? Be specic. '2 Do you expect the direction of the acceleration to change when the cart is going up the incline vs. down the incline? '2 Thinking ahead towards your discovery experiments, what physical systems might be interesting to study and why? Give one constant and one non-constant acceleration example