Frequently Asked Questions:

SE 207 Unit 2


  1. In some diagrams, Masses are shown to move on small wheels. What does this represent?

  2. Answer:

    This means that the friction between the two surfaces is negligible.


  3. How many free body diagrams are needed to obtain the equations of motion of a system?


You need to draw a free body diagram for each mass or junction point that moves with a velocity that is unknown in advance.