Summer Research Program for Science Teachers
Bronx HS of Science
August 2003
Graphing motion with a motion detector
Learning Objectives: Students will be able to:
1. Use a computer generated graph to explain the motion of a body.
2. Analyze alternative explanations and models.
Materials: Motion sensor, computer, projector and screen, cart, rail.
Motivation: Demonstration #1: Connect a motion detector to a computer that has a graphing soft ware installed. Project the graph gridlines onto a screen or Television monitor. Collect some data with the motion detector by having a student (preferably a volunteer) initially walk slowly away from the detector, stop momentarily and then walk toward the detector at a faster rate.
Aim: How can we use graphs to analyze straight-line motion?
Development: The graph plotted from the motivation should resemble figure 1 below.
Question: Describe what is happening during sections A, B, and C.
Demonstration #2: In front of a motion detector, push a cart up an inclined rail and allow it to fall back to it’s starting point.
Question: Draw a prediction of what the graph might look like.
Project image on the screen. Graphs should be similar to figures 2 below.
Question: Describe what is happening during sections A, B, and C.
Summary: Explain why figure 1 is different from figure 2.
Homework: Throw an object into the air and catch it at the same point it was released. Draw a graph that describes the motion of the object. Give a detailed explanation of your graph.
Standards: Standard 1: Analysis, Inquiry, and Design
Students will use mathematical analysis, scientific inquiry, and engineering design, as appropriate, to pose questions, seek answers, and develop solutions.
Standard 2: Information Systems
Students will access, generate, process, and transfer information using appropriate technologies.
Standard 6: Interconnectedness: Common Themes
Students will understand the relationships and common themes that connect mathematics, science, and technology and apply the themes to these and other areas of learning.
Standard 7: Interdisciplinary Problem Solving
Students will apply the knowledge and thinking skills of mathematics, science, and technology to address real-life problems and make informed decisions.
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