This applet is a very good qualitative exercise for interpreting graphs. It can be used as a supplement to Microcomputer Based Labs (MBL) that use motion
detectors. Furthermore, if MBL resources are not available, this applet can be used as a virtual laboratory.
The option to show the velocity and acceleration vectors on the diagram is a
plus, however, see the caveat below. This will help students develop and
check their understanding of "speeding up", where the velocity and acceleration
are in the same direction, and "slowing down", where they are in opposite
The ability to reverse the coordinate axis can be used to help students understand that physics is independent of coordinates.