I’m not sure but I think it’s 
△ m=5 and △= -3 and so 
Answer: 5/△-3 m/s 
So sorry if it’s wrong
        
             
        
        
        

The net force acting on the block is ~


So, the Answer in the boxes will be ~ 

 
        
             
        
        
        
Because field lines don’t all go in to the pole. The bottom half go outwards not inwards.
        
                    
             
        
        
        
Answer:
Work done to lift the box is 515.03 J
Explanation:
By work energy theorem we know that work done by all forces is equal to change in kinetic energy
So we have

so we have

so we have



 
        
             
        
        
        
<span>How hard the surfaces push together and the types of surfaces involved.</span>