40 40 m north 40 m/s 40 m/s north
I gave my students this multiple choice question: Which of the following represents the velocity of a moving object?

Only one answer is correct among these 4 choices:
- 40
- 40 m north
- 40 m/s
- 40 m/s north

Could you tell me which one is correct?

40 m/s north