Physics

Displacement is about how far and in which direction an object actually moves from start to finish—not the path it takes. Since the train moves at a constant average velocity in one direction, you can use the straightforward relationship $\text{displacement} = \text{velocity} \times \text{time}$. The key is to convert your time to the same units as velocity (seconds), then multiply to get the displacement vector, which includes both magnitude and direction (west).

Displacement is about how far and in which direction an object actually moves from start to finish—not the path it takes. Since the train moves at a constant average velocity in one direction, you can use the straightforward relationship $\text{displacement} = \text{velocity} \times \text{time}$. The key is to convert your time to the same units as velocity (seconds), then multiply to get the displacement vector, which includes both magnitude and direction (west).