Vector quantities have both magnitude and direction. Distance is a scalar quantity. It refers only to how far an object has traveled. For example, 4 feet is a distance; it gives no information about direction.
        
                    
             
        
        
        
Answer:
not clear pic...but it's definitely not A)
 
        
             
        
        
        
Answer:


Explanation:
the maximum speed is reached when the drag force and the weight are at equilibrium, therefore:




To calculate the velocity after 100 meters, we can no longer assume equilibrium, therefore:



 (1)
 (1)
consider the next equation of motion:

If assuming initial velocity=0:
 (2)
 (2)
joining (1) and (2):




 (3)
 (3)





To plot velocity as a function of distance, just plot equation (3).
To plot velocity as a function of time, you have to consider the next equation of motion:

as stated before, the initial velocity is 0:
 (4)
 (4)
joining (1) and (4) and reducing you will get:
 
solving for v:

 Plots: