Determining Speed Lab Name:_________________________
Date:______________ Period:_____
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***Important: You will be working in a group of 2-3 students, but this is not a group activity.
You will collect your own data, and make your own calculations. Each student will submit their
own results and conclusions.
Purpose: to give you practice in measuring average speeds, and to get you thinking about average
and instantaneous speeds.
Materials:
meter stick, stop watch (or watch with a seconds hand)
Part 1 - Calculating Average Speed:
It is your job to determine your average speed. You will need to help other students collect their
data. Think about what you need to measure to determine the average speed, and how you will
go about making the calculations.
Note:It is more important to move at a consistent (and safe) speed than it is to go fast. This is
NOT A RACE and there are no prizes for "winning!"
Part 1 Data and Equations:
Speed = distance (m)/time s = d/t = m/s
Trial #
Distance (m)
Time (s)
Speed (m/s)
1
2
3
Average
Part 2 - Calculating an Unknown Distance:
When you have finished Part 1, report to your teacher. It is not necessary that your calculations
be complete.
1. Your teacher will show you an "unknown distance." Time your participants in walking
this distance. Record the results in the data table provided.
2. Use your average speed calculation from Part 1 and the time required to cover the
"unknown distance" to calculate the "unknown distance." Put your results in the data
table.
3. Your teacher will measure the "unknown distance", so you can judge the accuracy of
your calculation in number 2.
Part 2 Data and Equations:
Distance (m) = Speed (m/s) x time (s)
