Question

This is a50 point question. Answer with explanation.
Formula for impulse of force exerted by liquid jet on wall.

Answer 1

you will see the derivation in image.

Answer 2

OK
So buddy
Here is your answer
Impulse is termed as the total impact of the force.
Ft=mv-mu
In other words, impulse is termed as the product of force and time.......
I=Ft=p2-p1
So, we can tell that impulse is equal to change in momentum.
classical mechanics, impulse is the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector in the same direction.
SI unit: Newton second (N⋅s)
Other units: pound⋅s
Common symbols: J, Imp
Dimension: momentum

Examples of Momentum and Impulse:
1. In baseball, a ball that is only struck with a small part of the bat is not in contact with the bat for a long period of time so the change in momentum, or impulse, is small and the ball does not travel very far. However, if the bat strikes the ball squarely, the force is exerted for a longer time resulting in a greater change in momentum, or greater impulse, and the ball travels very far.

2. Air bags in cars are designed with impulse, or momentum change principles. When a driver gets into an accident their momentum carries them forward into the steering wheel. By putting an airbag in the car, a smaller force is exerted over a longer period of time to change the momentum of the driver to a stop. Without the airbag, a large force is exerted over a short time causing more damage to the driver.

I gave the examples of momentum and Impulse is because momentum and impulse are connected...
According to the question
Force of the wind exerted on a surface is given byF=ρ*A*V*V

Force is the rate of change of momentum.

Initial momentum of the fluid is (mass of fluid)*(velocity of the fluid)

Assuming, fluid becomes stationary after hitting the wall, final momentum of the fluid is zero

So total change of momentum is MV - 0 = MV

Force is rate of change of momentum.

F=d(MV)/dt = d(M)/dt * V = M' * V ———————(1)

Where M' is the mass of fluid hitting the wall per second

M' is given by (density)*(volume flow rate) and volume flow rate is obtained by (area of cross section)*velocity. So we get M'=ρ*A*V

Substituting this in (1) we get

F=ρ*A*V*V

In your case fluid is water, so ρ=1000kg/m3 and A=0.5m2 and V=5m/s. Substituting in above equation F=1000*0.5*5*5 = 12,500N or 12.5KN

HOPE it helps you to understand.
Plz mark me as brainliest if this helped you.