Interactive resource
Two moving points on a line
Geometry. Two points move on a number line; track positions and distance vs time. Free interactive GeoGebra resource — adjust parameters in the browser.
Overview
Two points move on a number line; track positions and distance vs time.
Explanation
Uniform motion: position = start + velocity × time (signed velocity).
They meet when coordinates are equal — solve for meeting time.
Toward each other: relative speed is the sum of speeds; same direction chase: difference of speeds.
How to use
Set starts and speeds, scrub time, and watch distance and meeting time.