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written by Fu-Kwun Hwang
sub author: Gary Richert
This applet presents a graphical, interactive picture of relative motion.  It illustrates how an object may appear to have different motions to different observers, depending on how the observers are moving with respect to one another.   Included are examples of how this applet may be used, and a worksheet from a different author.
Subjects Levels Resource Types
Classical Mechanics
- Motion in One Dimension
- Motion in Two Dimensions
- Relative Motion
- High School
- Lower Undergraduate
- Instructional Material
= Activity
= Interactive Simulation
Appropriate Courses Categories Ratings
- Physics First
- Conceptual Physics
- Algebra-based Physics
- Activity
- New teachers
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Free access
© 2001 Fu-Kwun Hwang
relative observers, relative velocity
Record Creator:
Metadata instance created March 11, 2004 by Cathy Ezrailson
Record Updated:
January 21, 2011 by Lyle Barbato
Other Collections:

This resource is part of a Physics Front Topical Unit.

Topic: Kinematics: The Physics of Motion
Unit Title: Frames of Reference

This animation illustrates the concept of relative motion by depicting a moving boat traveling with the river current. An observer walks onshore. You can view the motion from the reference frame of the boat, the river, or the ground and watch how the motion appears differently. Don't miss the accompanying worksheet.

Link to Unit:
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Record Link
AIP Format
F. Hwang, (2001), WWW Document, (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=140.0).
F. Hwang, NTNU Java: Relative Motion (frame of reference), (2001), <http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=140.0>.
APA Format
Hwang, F. (2001). NTNU Java: Relative Motion (frame of reference). Retrieved December 17, 2017, from http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=140.0
Chicago Format
Hwang, Fu-Kwun. NTNU Java: Relative Motion (frame of reference). 2001. http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=140.0 (accessed 17 December 2017).
MLA Format
Hwang, Fu-Kwun. NTNU Java: Relative Motion (frame of reference). 2001. 17 Dec. 2017 <http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=140.0>.
BibTeX Export Format
@misc{ Author = "Fu-Kwun Hwang", Title = {NTNU Java: Relative Motion (frame of reference)}, Volume = {2017}, Number = {17 December 2017}, Year = {2001} }
Refer Export Format

%A Fu-Kwun Hwang
%T NTNU Java: Relative Motion (frame of reference)
%D 2001
%U http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=140.0
%O application/java

EndNote Export Format

%0 Electronic Source
%A Hwang, Fu-Kwun
%D 2001
%T NTNU Java: Relative Motion (frame of reference)
%V 2017
%N 17 December 2017
%9 application/java
%U http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=140.0

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

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NTNU Java: Relative Motion (frame of reference):

Same topic as Einstein Light: Inertial frames and Newtonian mechanics

This is an animation-based tutorial designed to introduce relativity to beginners. This segment uses a merry-go-round to explore inertial and non-inertial frames of reference.

relation by Caroline Hall

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