Frictional force



A mass m1 rest on top of another mass , m2, which is connected to m3 by a light rope

This java applet show the force diagram and the motion of the system when the frictional forces are present.


  • Play it! and find out under what kind of condition:
    1. m1 and m2 would not be accelerated? (Net force =0.)
    2. m1 and m2 are accelerated together.
    3. m1 and m2 are accelerated differently. (a1 a2 which one is larger?)


    This is a sample gif picture.

    From the above equations, we can find out the accelerations.

    I did that calculation already! It is your turn to do it now! O.K.


    Your suggestions are highly appreciated! Please click hwang@phy03.phy.ntnu.edu.tw

    AuthorGFu-Kwun Hwang, Dept. of physics, National Taiwan Normal University

    Last modified :