* Momentum is a vector quantity: This means it has both magnitude (how much) and direction.
* Magnitude of momentum: The magnitude of momentum is calculated by multiplying the mass of the object by its speed: p = mv (where p is momentum, m is mass, and v is speed). Since the car has mass and speed, it has momentum.
* Direction of momentum: The direction of the momentum is the same as the direction of the car's velocity. Even though the car is changing direction along the curve, its velocity (and thus its momentum) is constantly changing direction.
In essence, even though the car's speed is constant, its velocity is constantly changing due to the curved path. This change in velocity means its momentum is also constantly changing direction.