Normal force and Friction force

[Fu-Kwun Hwang]

This applet illustrate relation between normal force and friction force.
You can change the angle θ to find out how normal force/friction force varies with angle.

Normal force N= m*g*cosθ
If  m*g*sin< μ N , friction force f=m*g*sinθ
otherwise  friction force f=μ N = μ*m*g*cosθ
where μ is static friction coefficient.
μ N is the maximum static friction force when the normal force equal N.

Embed a running copy of this simulation
<applet code='users.ntnu.fkh.normalforcefriction_pkg.normalforcefrictionApplet.class' archive='http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/2/ejs_normalforcefriction.jar' name='normalforcefriction4150' id='normalforcefriction4150' width='796' height='487' mayscript=true><param name='draggable' value='true'></applet>
Embed a running copy link(show simulation in a popuped window)
<a href='http://www.phy.ntnu.edu.tw/ntnujava/msg.php?smfejs=4150' target='smfejs'>Run simulation</a>

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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

• Please feel free to post your ideas about how to use the simulation for better teaching and learning.
• Post questions to be asked to help students to think, to explore.
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[lookang]

found this
http://pen.physik.uni-kl.de/w_jodl/MPTL/MPTL10/contributions/milazzo/A_new_Applet_Java_about_frictional_force.pdf

but their 2 friction applets didn't load in my browser properly, their others applets are okay.
http://www.fis.unical.it/~milazzo/Attrito/appletA.htm
http://www.fis.unical.it/~milazzo/Attrito/appletB.htm