Final answer:
In Physics, when a man runs with a uniform velocity of 3 m/s, the acceleration produced by him is 0 m/s², because there is no change in velocity over time.
Step-by-step explanation:
The subject of this question is Physics, specifically related to the concepts of velocity and acceleration. When an object moves with a uniform velocity, such as a man running at a constant speed of 3 m/s, it means there is no change in the velocity over time. Therefore, the acceleration produced by him is 0 m/s² since acceleration is the rate of change of velocity and his velocity does not change.
For example, an athlete accelerating uniformly from an initial velocity of 0 m/s to a final velocity of 4 m/s in 2 seconds would have an acceleration given by the formula a = (Δv)/(Δt) where Δv is the change in velocity and Δt is the change in time. The athlete's acceleration would be (4 m/s - 0 m/s) / (2 s) = 2 m/s².