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Person Landing After a Jump
written by Aaron Titus
This lab uses Tracker 4.0 video analysis software to measure and analyze the center of mass motion of a person landing after a jump. Students measure the acceleration of the person in free-fall and his acceleration while he is landing and slowing down. Students use the data to calculate the force of impact by the floor on the student during the landing. There are two video files:  (1) the student bends his knees a maximum amount during the landing in order to decrease the force of impact by the floor; and (2) the student bends his knees a small amount in order to increase the force of impact on the floor.

The zip file contains two folders: (1) a long time interval during the landing and (2) a short time interval during the landing. Each folder includes the lab handout, a video, and a Tracker 4.0 file. The video was recorded by Aaron Titus at High Point University.

To open the Tracker file, download and run Tracker from Tracker is free.

The videos can be used with other video analysis software; however, the handout has screen captures from Tracker 4.0 and instructions specifically written for Tracker 4.0.
1 supplemental document is available
Subjects Levels Resource Types
Classical Mechanics
- Linear Momentum
= Collisions in Two Dimensions
- Motion in Two Dimensions
= 2D Velocity
= Center of Mass
Education Practices
- Active Learning
= Modeling
- Lower Undergraduate
- Middle School
- High School
- Instructional Material
= Activity
= Laboratory
= Tutorial
- Audio/Visual
= Movie/Animation
Intended Users Formats Ratings
- Learners
- Educators
- video/quicktime
- application/pdf
- application/zip
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Access Rights:
Free access
This material is released under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 license.
Rights Holder:
Aaron Titus
center of mass, constant acceleration, tracker, video analysis, video lab
Record Cloner:
Metadata instance created June 29, 2011 by Aaron Titus
Record Updated:
June 14, 2012 by Lyle Barbato
Last Update
when Cataloged:
January 9, 2011
Other Collections:

ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
A. Titus, Computer Program PERSON LANDING AFTER A JUMP (2011), WWW Document, (
A. Titus, Computer Program PERSON LANDING AFTER A JUMP (2011), <>.
APA Format
Titus, A. (2011). Person Landing After a Jump [Computer software]. Retrieved February 28, 2017, from
Chicago Format
Titus, Aaron. "Person Landing After a Jump." (accessed 28 February 2017).
MLA Format
Titus, Aaron. Person Landing After a Jump. Computer software. 2011. 28 Feb. 2017 <>.
BibTeX Export Format
@misc{ Author = "Aaron Titus", Title = {Person Landing After a Jump}, Month = {January}, Year = {2011} }
Refer Export Format

%A Aaron Titus
%T Person Landing After a Jump
%D January 9, 2011
%O video/quicktime

EndNote Export Format

%0 Computer Program
%A Titus, Aaron
%D January 9, 2011
%T Person Landing After a Jump
%8 January 9, 2011

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Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

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