1. The slope of each line tells you the runner's speed. A steeper slope indicates a higher speed.
2. Albert completed the 100m race in the least amount of time. His time was 12 seconds.
3. Charlie started out the fastest, as his line has the steepest initial slope.
4. Between 8 seconds and 10.5 seconds, Charlie was stationary (not moving), as his distance did not change during this interval.
5. A straight line on this graph tells you the runner is moving at a constant speed. A curved line tells you the runner's speed is changing (accelerating or decelerating).
6. Albert overtook Bob at approximately 50 meters and 8 seconds.
7. The total displacement of all three runners (Δd) was 100 meters, as they all started at 0 meters and finished at 100 meters.
Parent Tip: Review the logic above to help your child master the concept of motion graph worksheet.