Two identical trucks, having the same mass, are traveling down a long straight flat road at constant speeds. However, Truck A has a greater speed than Truck B. Truck A has a greater ___.

Momentum

Explanation:

Truck A has a greater momentum compared to Truck B.

Momentum is the product of mass and velocity of a body;

Momentum = mass x velocity

We see that the body with more mass and velocity will have a higher momentum.

Since the two bodies have the same mass, and the speed A is greater, then A will have a greater momentum.