Force & Motion: Position vs Time

As a motion sensor measures their body position, students try to match a position vs. time graph. This activity solidifies an understanding of the fundamental concepts in motion: frame of reference, position and velocity.

Position vs Time

In this competitive and highly interactive activity, students try to match a position versus time graph by moving in front of a motion sensor. In competing for the best score, students develop an understanding of frame of reference, how to interpret position vs time graphs, and discuss concepts of zero velocity, constant velocity, and even acceleration. Enlarge graph.

Lab Summary:

Students will use a Motion Sensor to compare and contrast their motion as they move back and forth relative to the sensor in a straight line at a constant speed. This kinesthetic experience will provide the students with concrete examples of position, frame of reference, distance, and distance traveled.

Their challenge will be to move in such a way that their motion will "match" a predetermined position-time graph, referred to as a Match Course.

Download free labs:

(student versions)

Computer-based lab  (PDF, 1 MB)

Xplorer GLX-based lab  (PDF, 3.6 MB)

Method:

Use a Motion Sensor to measure your motion as you move back and forth in front of a flat reflector along a straight line at different speeds. Analyze the graph of position versus time.

Here's What You Need:

Required for computer-based lab:

(See lab download for Xplorer GLX-based lab requirements, which may differ)

Probeware

Other Materials

  • Motion Sensor Reflector Board (648-07373)

Lab Manual:

The computer-based activity is included in Explorations in Physics (PS-2810). The Xplorer GLX-based lab is included in Physics with the Xplorer GLX (PS-2826). Both manuals are complete with Teacher Information pages, student instructions and handouts, and sample data.

For your convenience, we offer bundles which provide the probeware for the activities in the manual. For more, please see:
Computer-based Physics Lab Manual and Bundles
Xplorer GLX-based Physics Lab Manual and Bundles