1. In long jump in sports competitions, is the performance judged based on distance or displacement?

Answer: (1) Displacement; (2) The displacement is 0 meters and the distance is 400 meters; (3) The distance is not necessarily the same for the same displacement, just like the previous one, one is the loss and the other is Scalar; (4) Within 2s it is time, at the end of 2s it is time, within 2s it is time, at the end of 2s it is moment! Thank you for telling me finally, time is a certain period of time, moment is a certain time!