This movie is organized in eight scenes.

• Scene 1:State the Problem to Be Solved.
• Scene 2:Table of Contents.
• Scene 3:Moments and Stresses.
• Scene 4:Resultant Horizontal Forces.
• Scene 5:Satisfying Equilibrium.
• Scene 6:Some Conclusions.
• Scene 7:More Conclusions.
• Scene 8:End of Movie.

To skip directly to a particular scene, select it from drop down menu above.