At a given instant of time, a car and a truck are traveling side by side in adjacent lanes of a highway. The car has a greater velocity than the truck. Does the car necessarily have a greater acceleration? Explain.

NO.

Explanation:

No, It does not mean that the acceleration of the car will be higher.

The car and the truck are moving in the same direction but may have any value of acceleration. Higher velocity of car cannot imply higher acceleration. Acceleration is change in velocity to the change in time. Even if the velocity of car is higher it does not mean its change in velocity will be higher.