Energy Conservation Lab

888 Words4 Pages
Energy Conservation Abstract: Objective To investigate whether or not energy is conserved in three simple mechanical systems: - swinging pendulum. - basketball shot. Equipment Computer with Data Studio and LoggerPro software, Science Workshop interface with Motion Detector and Rotary Motion Sensor, pendulum assembly, spring, hooked mass, pre-recorded video clip of basketball shot. Procedure Part 1. Swinging pendulum. The pendulum is attached to the rotary motion sensor and set up to measure the angular position of the swinging mass as a function of time. Using trigonometry you will convert the angular position of the pendulum into x-y coordinates in the Cartesian system with the origin at the lowest point of the swing. This data will allow you to calculate the x and y components of the linear velocity of the pendulum bob and its total speed along the path of swing needed to determine the kinetic energy. The potential energy of the moving mass will be estimated with respect to the rest position of the pendulum (the origin of the system of coordinates). Measure the length L of the pendulum = the distance between the pivot and the center of the bob. Open the pre-set experiment file as directed on the whiteboard. Run 1-point calibration (Adjust Offset Only) to set the zero for angle measurements when the pendulum is at rest at the lowest point of swing. Part 3. Basketball shot. In this part of the lab you will verify the conservation of energy law for a basketball undergoing a projectile motion. You will analyze a pre-recorded video clip using the video analysis feature of the LoggerPro software. Open Logger Pro. Now on the main menu bar click INSERT→MOVIE and open the clip “Basketball Shot” from your PHY 122 lab folder Before you begin you will need to open the video analysis tool bar and set the size scale of the video. To do this
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