A bus travels 4 km due north and then 3 km due west going

from bus station A to bus station B. The magnitude of the bus'

displacement from station A to station B is __km

The magnitude of the displacement is the distance between the starting position and the end position.

The bus moves north, then west, forming a right triangle. Its displacement is therefore the length of the hypotenuse.

x² = 3² + 4²

x = 5

The magnitude of the bus's displacement from station A to station B is 5 km.