This document outlines an experiment to investigate how distance, time, and average speed are related by measuring how quickly a row of dominoes can be toppled. Students will set up rows of dominoes with varying average distances between pieces, measure the time it takes for each row to fall, calculate average speeds, and graph the results to analyze the relationship between average distance and toppling speed. The objectives are to understand how these variables are interrelated and to master graphing techniques.

1. Domino Effect Lab Title Objectives Investigate the ways in which distance, time, and average speed are interrelated by maximizing the speed of falling Dominoes (Or Jenga Pieces). Master X-Y Graphing Techniques Materials Procedure Step by Step “Movie Script” Data Contains measurements and calculations Analysis “Make sense” of the data Discussion Talks about the results and how they relate to the objectives Conclusion Short paragraph explaining the results of the experiment and whether the objectives were achieved.

2. Introduction Read the Discussion section on Page 5 in the “blue” lab manual

3. Procedure Setup a string of dominos or Jenga Pieces (20-50 pieces long) Measure the total length of your row of dominoes. Compute the average distance between dominos. Record Time it takes for Dominos to topple. Compute the Average Speed of each falling Domino. Repeat for nine (9) trials by testing different (near and far) average distances between each domino. Record data to Data Table. Represent Data on X-Y Coordinate plane as a Line Graph.

4. Analysis: Data Table

5. Analysis: Graph Average Between Lengths vs. Speed of Topple Average Speed (cm/s) Average Lengths Between dominos. (cm)

6. Discussion What is the definition of average speed? What are the factors that affect the speed of falling dominoes? Why do we use average speed rather than instantaneous speed to describe the rate of dominos falling? From your graph, what is the maximum or minimum toppling speed? What spacing between dominoes do you predict would give the maximum or minimum speed? What is the ratio of this spacing to the length of a domino? At the maximum or minimum toppling speed, how long a row of dominoes would be required to make a string that takes one minute to fall?

7. Conclusion Short paragraph explaining the results of the experiment and whether the objectives were achieved.