Passage III

The 3 sets of graphs below represent the motion of 3 different motorbikes on a straight track. The top graph in each set shows the distance of the motorbike from the starting line versus elapsed time. The middle graph in each set shows the velocity of the motorbike versus elapsed time. The bottom graph in each set shows the acceleration of the motorbike (the rate at which the motorbike's velocity changes) versus elapsed time.

18. The statement “If an object's acceleration is zero during a time period, then the object's velocity is zero during that period" is contradicted by which segment of the graphs in Set 3?

Answer and Explanation

Your Answer is

Correct Answer is J

Explanation

Look at the last two pictures of set 3, when the acceleration of the CD section in the third picture is 0, the speed of the CD section in the middle picture is not 0, so choose J