Imagine you're at the top of a steep hill in your car. You've just come to a stop, ready to start rolling downhill.

* Zero Speed: You're currently stationary, so your speed is 0.

* Definite Acceleration: Gravity is pulling your car downwards. This means the car is experiencing an acceleration in the direction of the slope, even though it hasn't started moving yet.

As soon as you release the brake, the car will begin to move, gaining speed due to that acceleration. This is a classic example of how a car can have zero speed but definite acceleration.