Question

directions:

1. follow the directions on the slide.
2. type the direction of travel and the relative speed of each compared to the 2 others (i.e. complete the biker’s motion to both the runner and the walker’s motion)

ws - describe the motion (page 2)
which is moving faster?
bikers motion
type here
runners motion
type here
walkers motion
type here

Explanation:

The position-time graph shows that all three (biker, runner, walker) have positive slopes, meaning they travel in the same positive direction. Speed is the slope of a position-time graph ($\text{speed} = \frac{\text{distance}}{\text{time}}$); a steeper slope means higher speed.

1. Biker: Steepest slope, so fastest.
2. Runner: Slope is less steep than the biker but steeper than the walker.
3. Walker: Gentleest slope, so slowest.

Answer:

• BIKER'S MOTION: Travels in the same positive direction as the runner and walker; moves faster than both the runner and the walker.
• RUNNER'S MOTION: Travels in the same positive direction as the biker and walker; moves faster than the walker but slower than the biker.
• WALKER'S MOTION: Travels in the same positive direction as the biker and runner; moves slower than both the biker and the runner.