Question

which is a valid velocity reading for an object?
45 m/s
45 m/s north
0 m/s south
0 m/s

Explanation:

Velocity is a vector quantity, which means it has both magnitude and direction. While speed is a scalar quantity with only magnitude. Options with just magnitude like 45 m/s and 0 m/s represent speed. Options with magnitude and direction like 45 m/s north and 0 m/s south are valid velocity readings.

Answer:

B. 45 m/s north, C. 0 m/s south