About the Meeting & Overtaking simulation
Two bodies on the same straight road meet when they are at the same position at the same time. Write x(t) for each and set them equal: with constant accelerations this is at most a quadratic, so there can be no meeting, one, or two. On an x–t graph the meetings are where the two lines cross.
This meeting and overtaking simulation lets you set each car's start position, velocity, acceleration and start delay, then finds every meeting exactly and marks it on the road and the graph. Switch to the view from car A to see the same problem as relative motion: B moves with the relative velocity vB − vA, and they meet when the relative displacement returns to zero.
Also covers: two cars meet, when and where do they meet, overtaking problem, relative velocity in one dimension, catch up problem, head on, position time graph intersection.
