Ok srry bout last time but the answer is A) kelvin: time the reason is because everything else is a SI. Hope this helps and TURTLE
 
        
                    
             
        
        
        
The correct field line would be A.
        
                    
             
        
        
        
Answer:
9.4
Explanation:
magnitude is the sum of the squares. 

If you are given horizontal and vertical components, treat those as the rise and run of a triangle, the rise of 8 with a run of 5 and you want to find the hypotenuse. 
How do you find the long side of a triangle?  
 
        
             
        
        
        
Idk but i hope you figure it out :)
        
             
        
        
        
Answer: 5 m/s North
Explanation:
Velocity = Momentum/Mass
Velocity = 225 kg*m/s/45kg
Velocity = 5 m/s North