ANSWER: NATURE
EXPLAINTION:
        
             
        
        
        
Answer:
a) a = 4.9 m / s²,  N = 16.97 N   and b)   F = 9.8 N
Explanation:
a) For this exercise we will use Newton's second law, we write a reference system with the x axis parallel to the plane, see attached, in this system the only force we have to break down is weight, let's use trigonometry
         sin 30 = Wx / W
         cos 30 = Wy / W
         Wx = W sin30
         Wy = W cos 30
Let's write the equations on each axis
X axis
         Wx = ma
Y Axis  
        N- Wy = 0
        N = Wy = mg cos 30
        N = 2.0 9.8 cos 30
        N = 16.97 N
We calculate the acceleration
        a = Wx / m
        a = mg sin 30 / m
        a = g sin 30
        a =9.8 sin 30
        a = 4.9 m / s²
b) For the block to move with constant speed, the acceleration must be zero, so the force applied must be equal to the weight component
       F -Wx = 0
       F = Wx
       F = m g sin 30
       F = 2.0 9.8 sin 30
       F = 9.8 N
 
        
             
        
        
        
Answer:
v_f = 10.85 m/s
Explanation:
We will apply the law of conservation of momentum here:

where,
m₁ = mass of roller skater = 47 kg
m₂ = mass of bag = 6 kg
v_1i = initial speed of roller skater = 12 m/s
v_2i = initial speed of the bag = 0 m/s
v_1f = final speed of the roller skater = ?
v_2f = final speed of the bag = ?
Both the bag and the skater will have same speed at the end because kater is carrying the bag:
v_1f = v_2f = v_f
Therefore, the equation will become:

<u>v_f = 10.85 m/s</u>
 
        
             
        
        
        
I think the answer to this problem I believe would probably be B. learned optimism. I think it's the closest answer...I THINK
        
                    
             
        
        
        
Answer:
I = 0.25 [amp]
Explanation:
To solve this problem we must use ohm's law which tells us that the voltage is equal to the product of the current by the resistance.
V = I*R
where:
V = voltage [Volt] 
I = amperage or current [amp]
R = resistance [ohm]
Since all resistors are connected in series, the total resistance will be equal to the arithmetic sum of all resistors.
Rt = 2 + 8 + 14
Rt = 24 [ohm]
Now clearing I for amperage
I = V/Rt
I = 6/24
I = 0.25 [amp].