Explanation:

When an object changes its direction, its velocity also changes. The change in velocity is known as acceleration. In this case, the truck is traveling due North and then turns west. Therefore, the direction of the truck changes from North to West.

Initial Velocity: 20 m/s due North

Final Velocity: 20 m/s due West

Change in Velocity: 20 m/s to the West

Explanation in Detail:

When the truck is traveling due North, its velocity can be represented as a vector with a magnitude of 20 m/s and a direction of due North. When the truck turns West, the direction of its velocity changes. The velocity vector can now be represented as a vector with a magnitude of 20 m/s and a direction of due West.

The change in velocity can be calculated by subtracting the initial velocity vector from the final velocity vector. In this case, the change in velocity would be the final velocity vector (20 m/s due West) minus the initial velocity vector (20 m/s due North). The result is a velocity vector with a magnitude of 20 m/s and a direction of due West.

The change in direction can be calculated by comparing the initial direction of the velocity vector (due North) to the final direction of the velocity vector (due West). The direction of the velocity vector changes by 90 degrees from North to West.

Conclusion:

In conclusion, when a truck traveling due North at 20 m/s turns West and travels at the same speed, its velocity changes to a vector with a magnitude of 20 m/s and a direction of due West. The change in velocity is 20 m/s to the West, and the change in direction is 90 degrees from North to West.