Ferris Wheel: Compare Moving vs Still at 9 o'clock

This GeoGebra example dynamically compares a moving point and a stationary point on a Ferris wheel at the 9 o'clock position, illustrating position, velocity, and reference frame differences in circular motion. Core math concepts include parametric equations of a circle, vectors, relative motion, and isochronism. Construction highlights: uses the Intersect command to find intersection points, creates Moving and Still objects, employs text labels (text1, text2, text3) for annotations, and includes auxiliary points A, B, Splashdown, Splash, as well as parameters or segments a and b. Suitable for high school students learning circular motion, vectors, and relative motion, and for interdisciplinary physics-math teaching to clarify how reference frames affect motion description.