Force & Motion: Constant Velocity
You are going to face several challenges with respect to position and velocity.
Students will see a change in the slope of the graph as mass is changed, enabling them to compare two different but constant velocities
Lab Summary
Students will use the Motion Sensor to come to an understanding of the relationship between position and velocity.
First, students will qualitatively examine a plot of position versus time. Next, they will establish the meaning of the plot's slope. In turn, they will investigate the plot of velocity versus time. Finally, the students will establish the relationship of the slope of position versus time and relationship to the average or mean velocity established in the graph of velocity versus time.
Theory
When the cart is set to move with a constant velocity, an increase in mass will produce a graph (of Position vs Time) with a smaller slope thus indicating a lower velocity.
Downloads
- Computer-based lab (PDF, 548 KB) (545 KB, .pdf)
(student versions)
- Xplorer GLX-based lab (PDF, 364 KB) (362 KB, .pdf)
(student versions)
Method
Use a Motion Sensor to measure the motion of a motorized cart as it moves at different speeds. Analyze the graph of the motion.
Here's What You Need
U.S. Educator prices shown.
Required for computer-based lab: (See lab download for Xplorer GLX-based lab requirements, which may differ)
Probeware
PASPORT Motion Sensor (PS-2103A) - $80
Accurately measures position, velocity, and acceleration of a target. For use with PASPORT Interfaces.
Xplorer GLX (PS-2002) - $349
The Xplorer GLX is a data collection, graphing, and analysis tool designed for science students and educators.
Other Products
1.2 m PAScar Dynamics System (ME-6955) - $259
Equip your lab with carts and a high-quality 1.2 m aluminum track.
Variable Speed Motorized Cart (ME-9781) - $179
Cart has adjustable speed and climbs up a 30 degree slope.
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 you 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
