Q. When a problem states “The velocity of the water flow in a pipe is 20 m/s”, which of the following velocities is it talking about?
✅ Correct Answer: (B)
average velocity
Explanation: in a pipe-flow, the velocity is always referred to the average velocity. there may be a case where all water particles move in the same direction with 20 m/s, then the average velocity will be equal to absolute velocity. but, this is only a special case.