Graph Matching

Topics: Kinematics, Classical mechanics, Velocity Pages: 4 (905 words) Published: July 11, 2011
LAB # 1
Graph Matching

Principles of Physics I Laboratory
Breanna Wilhite

In this lab motion will be represented by graphs that plots distance and velocity vs. time. A motion detector will be used to measure the time it takes for a high frequency sound pulse to travel from the detector to an object and back. By using this method sound can determine the distance to the object, or its position. This device will determine in what direction the woman in the video was walking and how fast she was walking. This information will be plotted on a graph and show the motion as the woman moves, whether she speed up or slowed down. Logger Pro will use the change in position to calculate the object’s velocity and acceleration. All of this information is in graph form. A qualitative analysis of the graphs of motion will help you develop an understanding of the concepts of kinematics.

The motion of an object can be measured using a motion detector. The detector helps in knowing where an object is according to an indication point. How fast and in what direction an object is moving, and how an object is accelerating is necessary in understanding the kinematics graphs. The Motion detector uses pulses of ultrasound that bounces off of an object to determine the position of the person/object. As the person moves, the change in its position is measured many times each second. The change in position is expressed as velocity (meters /second). The change in velocity from moment to moment is expressed as acceleration (meters /second /second). The position of an object at a particular time is then plotted on a graph.

Logger Pro
3.1.2 Computer

Methods, Procedures, and algorithms
Upon opening Logger Pro, the file labeled “Graph Match” was then opened from the sample movies folder. Once this file was opened, the video analysis panel was then enabled. The “Set Scale” was located on the panel and pressed and a green line was drawn from...
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