Pendulum Model: This model simulates the movement of a pendulum. At small angles (q<0.5) the x component of the oscillation begins to look like simple harmonic motion, the same type of motion you saw with the springs last week.
If you rotate the 3D view (click and drag) so that you are looking "up" at the pendulum, you can easily see the x component of the bob's position alone. Does it look like what you saw last week (but turned sideways)?
It should look almost like the bob is a mass on a spring where the center point is equivalent to a spring's equilibrium point!
By Jacob Brock.