Explanation:
In vector geometry, the resultant vector is defined as: “A resultant vector is a combination or, in simpler words, can be defined as the sum of two or more vectors which has its own magnitude and direction.”
I hope it's helpful!
 
        
             
        
        
        
In order to completely describe a velocity, 
you need a speed and a direction.
        
             
        
        
        
The work done by the battery is equal to the charge transferred during the process times the potential difference between the two terminals of the battery:

where q is the charge and 

 is the potential difference.
In our problem, the work done is W=39 J while the potential difference of the battery is 

, so we can find the charge transferred by the battery:
 
 
        
        
        
A baseball will curve better on the flat plain if it is higher than sea level but low elevation.  
Hope this helped!