The following simulation try to illustrate why the friction force does not depends on macro-scopic area.
However, it does depends on microscope contact area.

The multiplication of width(w) and height(h) are kept constant. w*h=A=constant.

When the width is educed, the height increase (so the pressure increase).

A new function has been added: you can drag spring to change the external force acting on the object.

I need feedback from you! Thank you in advance!

Click the eye (image) to display the simulation

/htdocs/ntnujava/ejsuser/2/users/ntnu/fkh/frictionMicro2_pkg/frictionMicro2.propertiesFull screen applet or Problem viewing java?Add to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(977.1kB):double click downloaded file to run it. (2 times by 2 users) , Download EJS source View EJS source