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.

17. When a motorbike travels forward on the track, it has positive velocity; if it were to travel in reverse, it would have negative velocity. Which of the following descriptions of motion would result in a velocity versus time graph with both positive and negative velocity values?

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

To put it bluntly, the positive and negative of the speed means that an object moves in two opposite directions successively. In the process of two people passing the basketball, the basketball will move in two opposite directions, so choose A