Question

Use the graph of speed versus time to answer the questions about acceleration. A) Which of the cars is speeding up?

Answer 1

Car A is speeding up; Car C is slowing down; while Car B is maintaining a constant speed.

Answer 2

The height of a point on the graph corresponds to a speed on the y-axis.

-- As time goes on, the line for Car-A gets higher. Car-A is speeding up.

-- As time goes on, the line for Car-C gets lower. Car-C is slowing down.

-- As time goes on, the height of the line for Car-B doesn't change. Car-B is maintaining a constant speed.