Two cars are moving in the same direction in parallel lanes along a highway. at some instant, the velocity of car a exceeds the velocity of car b. does that mean that the acceleration of car a is greater than that of car b? explain.

Yes the acceleration of car A is greater than that of car B

Explanation:

Acceleration= Rate of change of velocity

If both cars are moving with the same velocity the acceleration would be zero because neither the velocity nor the direction is changing. if the velocity of the car A changes then there would be some acceleration and hence it will be greater than zero or greater than the acceleration of car B.