Answer:
what is this 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
5.0 ft-lbf
Step-by-step explanation:
The force is

This force is not a constant force. For a non-constant force, the work done, <em>W</em>, is

with  and
 and  the initial and final displacements respectively.
 the initial and final displacements respectively.
From the question,  and
 and  .
.
Then

Evaluating the indefinite integral,

From the rules of integration,


Returning the limits,

 
        
             
        
        
        
3(8)-12=12
24-12=12
The fourth choice.
Yeah I think you already got it
        
             
        
        
        
Answer:
A.
-19 9 7
[15 -7 6 ]
 -2  1  1
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation: