1. The problem statement, all variables and given/known data As water flows through the pipe at a velocity of 5 m/s, it encounters the orifice plate, which has a hole in its center. The pressure at A is 255 kPa , and at B it is 180 kPa, Assume water is ideal fluid, that is, incompressible and frictionless. Determine the force the water exerts on the plate. Consider the volume of water between A and B as a control volume and apply linear momentum equation. 2. Relevant equations F = d/dt ∫ρVdv + ∫Vρ(V•n)dA 3. The attempt at a solution Well, I have velocity of 5 m/s, which is constant. The density of the water should remain constant throughout time and space I have two pressures The area I used was π(200mm - 75mm)2 But I don't know what to do with volume, the integrals, anything. I don't even know if I'm using the right equation. Is this a Conservation of Energy equation instead? I know that has explicit pressure terms . . . But the problem says linear momentum . . . So do I use ρA + ρA?