I'm probably going to have to say C. E as it seems the steepest right around there. If I'm wrong on that, it has to be B. B
 
        
                    
             
        
        
        
Answer:
A. the total net force is 14
B. the total net force is 15
Explanation:
 
        
             
        
        
        
Answer:
 P₁ = 2.215 10⁷ Pa, F₁ = 4.3 106 N, 
Explanation:
This problem of fluid mechanics let's start with the continuity equation to find the speed of water output
         Q = A v
         v = Q / A
The area of a circle is
        A = π r² = π d² / 4
Let's look at the speeds at each point
        v₁ = Q / A₁ = Q 4 /π d₁²
        v₁ = 10 4 /π 0.5²
        v₁ = 50.93 m / s
        v₂ = Q / A₂
        v₂ = 10 4 /π 0.25²
        v₂ = 203.72 m / s
Now we can use Bernoulli's equation in the colon
        P₁ + ½ ρ v₁² + ρ g y₁ = P₂ + ½ ρ v₂² + ρ g y₂
Since the tube is horizontal y₁ = y₂. The output pressure is P₂ = Patm = 1.013 10⁵ Pa, let's clear
        P₁ = P2 + ½ rho (v₂² - v₁²)
       P₁ = 1.013 10⁵ + ½ 1000 (203.72² - 50.93²)
       P₁ = 1.013 10⁵ + 2.205 10⁷
       P₁ = 2.215 10⁷ Pa
la definicion de presion es
       P₁ = F₁/A₁
      F₁ = P₁ A₁
      F₁ = 2.215 10⁷ pi d₁²/4
      F₁ = 2.215 10⁷ pi 0.5²/4
      F₁ = 4.3 106 N
       
 
        
             
        
        
        
Answer: 1479watts
Explanation:
Power is defined as the energy expended or work done in a specific time. 
Mathematically,
Power = Workdone/time taken
Since work done is force × distance
Power = force × distance/time
Force = Mary's weight = 87N
Distance = height of the flight = 102meters
Time = 6.0seconds
Substituting in the formula we have;
Power = 87 × 102/6
Power = 1,479watts
Note that the time must be in seconds before usage. If its given in minutes, you will have to convert to seconds