Question

At a given instant of time, a car and a truck are travelling 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.​

Answer 1

Answer: No

Explanation:

The car may or may not have a greater acceleration. The instantaneous velocity of the car is greater than that of the truck, but it's acceleration may be positive, negative or even zero. The acceleration of car may be less than that of a truck.

Answer 2

Answer:

The car does not necessarily have a greater acceleration.

Explanation:

At a given instant of time, a car and a truck are travelling side by side.

And the car has a greater velocity than the truck.

• If the velocity of the car is greater than the truck, then it is not necessary that the car have greater acceleration than the truck.
• Acceleration is defined as the change in velocity per unit time.
• We are given at an instant of time, and greater velocity, so don't know whether there is any change in the velocity.
• So, greater velocity does not mean the greater acceleration.

Therefore, the car does not necessarily have a greater acceleration.