5.10 Increase in Flow Velocity

5.10 Increase in Flow Velocity

We can increase the flow velocity of water in a rubber pipe by squeezing it. When we squeeze the rubber pipe, we decrease the cross-sectional area through which the water flows. According to the equation of continuity:

where $A_{1}$ is the cross-sectional area and $v_{1}$ is the flow velocity. By decreasing the cross-sectional area ($A_{2} < A_{1}$), the velocity of the water ($v_{2}$) must increase to maintain the same flow rate. Therefore, squeezing the rubber pipe increases the flow velocity of fluid.