The magnitude of the displacement the person traveled is 0.
Solution:
Starts driving and 3 km east to a store.
⇒ Distance = 3 km
Displacement = 3 km
Turns around and travels 1 km west to another store.
⇒ Distance = 1 km
Displacement = -1 km
Person travels 2 km west, back to the starting point.
⇒ Distance = 2 km
Displacement = -2 km
Magnitude of the displacement this person traveled
= 3 km + (-1 km) + (-2 km)
= 3 km - 1 km - 2 km
= 3 km - 3 km
= 0
The magnitude of the displacement the person traveled is 0.
