Answer:

Step-by-step explanation:
The unit vector for a nonzero vector, say u, in the direction of u is given by:
û =  ---------------(i)
             ---------------(i)
Where;
|u| = magnitude of vector u
From the question;
u = (4, -4)
First let's calculate the magnitude of u as follows;
|u| = 
|u| = 
|u| =  =
 = 
Now, substitute u and |u| into equation (i) as follows;
û = 
û = 
û = 
Therefore, the unit vector is 
 
        
             
        
        
        
Answer:
Step-by-step explanation: 
 
        
                    
             
        
        
        
Answer:
2  = 2
 = 2  = 2
 = 2  lb.
 lb.
Step-by-step explanation:
One line represents 1/16 lb.