The uniform motion ratios allow finding which intervals have constant velocity, the correct answers are
     BC    Positive velocity
     CD    Zero speed
     DE    Negative velocity
Kinematics studies the movement of bodies, establishing relationships between position, velocity and acceleration. In the special case that the acceleration is zero the motion is called uniform movement
    v = [tex]\frac{\Delta_x}{\Delta t}[/tex]
    Δx = v Δt
Where v is average velocity, Δx is the position variation and Δt is the time variation in the analyzed interval.
This equation we see that the relationship between displacement and time is linear, let's analyze each interval given in the graph
AB interval
  In this interval the graph shows a curve whereby the movement is accelerated
BC interval
 In this interval the graph is a line with a positive slope, therefore the movement is uniform with positive velocity
CD interval
  In this part we have a line of zero slope
   In motion it is uniform with zero speed, that is, the car is stopped
DE interval
  The graph of this section is a line with a negative slope, consequently the velocity is negative.
With this analysis we see that the only interval that the movement is accelerated is the AB interval Â
In conclusion, using the uniform motion relationships we can find that intervals have constant velocity, the correct answers are
     BC   Positive velocity
     CD   Zero speed Â
     DE   Negative velocity
    Â
Learn more about average speed here:
https://brainly.com/question/22831524
