Final answer:
The correct answer is D. 0 m/s. This is because the ball has no initial vertical velocity when launched horizontally from a cliff.
Step-by-step explanation:
The initial vertical velocity for a ball launched horizontally from a cliff would be 0 m/s. This is because when an object is thrown horizontally, it means that all of its initial velocity is in the horizontal direction, and thus it has no initial vertical velocity.
Looking at our options:
- A. 30 m/s
- B. 50 m/s
- C. 150 m/s
- D. 0 m/s - Correct Answer.