I've been thinking about how to calculate how to find maximum thrust. But I can't find any equations for flow rate and pressure and area. I know that thrust is a force and force is mass x acceleration. But I dont know how id get an acceleration. There's an exit velocity at the nozzle of the rocket but there's no acceleration. The acceleration stops at the nozzle. I also know that the higher the exit velocity, the higher the thrust. And the way to increase exit velocity is to increase the pressure and the way to increase the pressure is to decrease the nozzle cross-sectional area. But decreasing the nozzle cross sectional area decreases the volumetric flowrate thereby decreasing the mass flow rate which decreases the mass part of the force equation and the thrust. I need equations relating flow rate, flow velocity, area, and pressure.