A high-speed hydraulic ram is forced by a pressure source, and we desire to predict how fast it can be stroked. Let the inlet pipe have length l and area A, and consider only inflow Q. The ram has mass m and area A2 and a force F(t) applied to it. To be conservative, assume that only the static pressure in the ram acts on the piston, that is, all the dynamic pressure is assumed to be lost. Make a bond graph for this system using a Bernoulli resistor to model the dynamic pressure loss. Apply causality and write equations of motion for the system.
