help in physics in BGE

Game Engine Game Engine Support and Discussion
#1

could someone explain the sensor physics type?
with example or something.

#2

Don’t have examples, but good description can be found here.
wiki.blender.org/index.php/Doc:Manual

#3

Also, try this:

http://www.tutorialsforblender3d.com/GameDoc/index_LogicBricks.html