To visualize the relationship between displacement, velocity, and time through graphical analysis.

Conceptual Experiment

Purpose: To visualize the relationship between displacement, velocity, and time through graphical analysis.

A fundamental job of physics is to describe the motion of an object. In order to do this, you need basic elements such as displacement, velocity, and time to depict it. In this activity, you will investigate how constant-paced linear motion is depicted and how you can calculate the velocity.

For the example problem, let us use a simple case. Let us assume that you are walking from your house at a constant pace for 100 seconds to get to the 100 meter-mark, and you come back to your house at the same pace.

After practicing with the sample problem, read the instructions and problem on the worksheet and complete it using the given data. In the worksheet, complete the graph, fill in the table, and answer the questions. Submit the completed worksheet for grading.

Unit I Assignment: Conceptual Experiment Worksheet

Running and Walking Problem

A research team developed a robot named Ellie. Ellie ran 1,000 meters for 200 seconds from the research building, rested for 100 seconds, and walked back to the research building for 1000 seconds. To find out Ellie’s average velocity for each case while running, resting, and walking, begin by plotting a graph between position and time.

Complete the Graph: The graph below will show you Ellie’s distance from the research building at a given time. Click the right cursor in the graphic area, and click on “Edit Data,” then select “Edit Data” or “Edit Data in Excel.” The time column is given to you. Enter the data in the distance column by reading the description shown above. The outcome will be shown in the graph.

(Click on the links in the Unit I Assignment instructions to access the PowerPoint presentation or the video for help with this assignment).

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po si

ti on

[ M

ET ER

S]

0

1

2

3

4

time [ sECONDS ]

0 1 2 3 4

Unit I Assignment Questions

Complete the Table: There are three different segments for running, resting, and walking, as you can see in the graph above. Use the table below to enter the data and find the velocity for each case.

Questions: Answer the questions below using complete sentences and add space as needed.

1. Distinguish between speed and velocity.

2. List the velocity from greatest to least among running, resting, and walking.

3. List the speed from greatest to least among running, resting, and walking.

4. If the slope in the plot of distance and time is steeper, do you think the speed of the motion is increasing or decreasing? Why do you think so?

Your response should be at least 75 words in length.

Time interval [sec] Corresponding distance change [meter]

Velocity [m/s]

Running

Resting

Walking

5. If the slope in the position versus time graph is a curved line, what can you tell about the motion?

Your response should be at least 75 words in length.

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