Five motion diagrams in which points represent the positions of an object at equal time intervals are shown below. Which statement is correct?
A)A has the greatest speed and the greatest acceleration.
B)C has decreasing speed.
C)D slows down and then speeds up.
D)D speeds up and then slows down.
E)E has a greater speed than A.

Question

Five motion diagrams in which points represent the positions of an object at equal time intervals are shown below. Which statement is correct? 
A)A has the greatest speed and the greatest acceleration. 
B)C has decreasing speed. 
C)D slows down and then speeds up. 
D)D speeds up and then slows down. 
E)E has a greater speed than A.

Quizplus · Accepted Answer

The motion diagram for D shows the points getting farther apart, indicating an increase in speed, until the fourth point where they start getting closer together, indicating a decrease in speed. Therefore, D speeds up and then slows down.

Five Motion Diagrams in Which Points Represent the Positions of an Object