Send the trolley out and then back, and park it on the drop point. The distance keeps climbing for every metre travelled, but the displacement is only the straight line measured from the start, so it can shrink, reach zero, or even go negative. Average speed uses distance, average velocity uses displacement, which is why the two readouts disagree.
MissionPark on the drop point at +30 m. Choose the out and back legs to land there.Round 1Streak 0Best 0
Average velocity will point:
distance travelled0 m
displacement from start0 m
average speed = distance ÷ time0.0 m/s
average velocity = displacement ÷ time0.0 m/s
out 100 m then back 50 m: distance 150 m, displacement +50 m