Virtual time (Geometric clock)
This activity belongs to the GeoGebra book The Domain of the Time.
Time does not exist. I have 15 minutes to convince you of that. Carlo Rovelli, Italian physicist, at the beginning of a TEDx talk
Despite the inaccuracy, we can explore the idea of using travel time proportional to its length. To do this, we can create a "virtual clock" based on the systematic repetition of a slider. Each back-and-forth movement of the slider will serve as a unit of measure for "virtual time". This virtual time will not coincide with real time but can be used to establish relative timings between moving objects. We can create our own "relative" clock. For example, by associating a counter with a slider. Each time the slider changes value, the counter will increase by one unit. In this way, the counter acts as a temporal reference, like a metronome, with which we can compare the durations of the movements.Author of the activity and GeoGebra construction: Rafael Losada.