Final answer:
The question is related to Physics, focusing on projectile motion and conservation of momentum concepts as they apply to water leaving a fire hose and impacting a wall. We can calculate the force exerted by the water on the wall by multiplying the rate of mass flow by the velocity.
Step-by-step explanation:
The subject of the question deals with projectile motion and the principles of conservation of momentum as applied to the motion of water leaving a hose and impacting a wall. When water leaves a fire hose at a certain velocity and angle, it follows a parabolic trajectory due to gravity, acting as a projectile. In addition, when water from a fire hose is directed against a wall, if the water's horizontal momentum is reduced to zero, there will be an impulse exerted on the wall, which can be calculated using the mass flow rate and the initial velocity of the water.
We can find the force exerted on the wall using the equation F = Δp/Δt, where Δp is the change in momentum, and Δt is the time during which this change occurs. Since the water's momentum is brought to zero upon impact, the change in momentum is equal to the initial momentum. Therefore, the force can also be computed by multiplying the rate of flow of the mass by the velocity of the water (F = m*v/t, with m/t being the rate of mass flow).