Car A has an initial speed of 0 m/s and a final speed of 25 m/s over 10 seconds. Car B has an initial speed of 25 m/s and a final speed of 15 m/s over 10 seconds. Car C has an initial speed of 15 m/s and a final speed of 25 m/s over 20 seconds. Car D has an initial speed of 10 m/s and a final speed of 10 m/s over 25 seconds. Which car had a negative acceleration?
