Final answer:
The object's velocity, travelling 200 m in 50 s with constant velocity, is 4 m/s, which is answer option A.
Step-by-step explanation:
Velocity is defined as the rate of change of position displacement with respect to time. The formula for velocity (v) is:
Velocity = Distance / Time
If an object is moving with a constant velocity and travels 200 m in 50 s, we can calculate its velocity by dividing the distance by the time. Using the formula:
Velocity = 200 m / 50 s
Velocity = 4 m/s
Thus, the correct answer would be A. 4 m/s.