Water moves through a horizontal pipe that tapers from a diameter of to
PHYSICS · Single correct · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids
Problem
Water moves through a horizontal pipe that tapers from a diameter of 6cm to 3cm. The speed of water in the wider section is 2m s−1. Which statement correctly describes the pressure in the narrower section compared to the wider section?
(a) The pressure in the narrow section is higher because the faster water exerts a larger force on the walls.
(b) The pressure at the two sections is identical since the pipe is horizontal and at the same height.
(c) The pressure in the narrow section is lower because the fluid speed is greater there.
(d) The pressure in the narrow section drops all the way to zero gauge pressure owing to its high speed.