Water emerges from a pipe and strikes a wall. As the jet impacts the wall, its horizontal velocity is $v$ and its cross-sectional area is $A$. The water has density $\rho$. The water does not bounce back from the wall. What force is exerted on the wall by the water?
- A$\frac{\rho v}{A}$
- B$\frac{\rho v^2}{A}$
- C$\rho A v$
- D$\rho A v^2$