An object is moving along a straight line. The graph shows the object's position from the starting point as a function of time.

-In which segment(s) of the graph does the object's average velocity (measured from t = 0 s) decrease with time?
A)AB only
B)BC only
C)DE only
D)AB and CD
E)BC and DE

Question

An object is moving along a straight line. The graph shows the object's position from the starting point as a function of time.

-In which segment(s) of the graph does the object's average velocity (measured from t = 0 s) decrease with time?
A)AB only 
B)BC only 
C)DE only 
D)AB and CD 
E)BC and DE

Quizplus · Accepted Answer

The object's average velocity (measured from t = 0 s) can be determined by finding the slope of the line connecting two points on the graph. In segments AB and CD, the slope is becoming less steep over time, indicating that the average velocity is decreasing. Therefore, the correct answer is E (BC and DE) as the slope is constant in these segments, meaning the average velocity is constant.

An Object Is Moving Along a Straight Line