A needle valve and collar.
        
                    
             
        
        
        
Answer: 0
Explanation:
75 newtons will push back canceling it out make it 0
 
        
             
        
        
        
▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂☘️
The potential energy of the object depends on 
- the height of the object with respect to some reference points,
-  the mass of the object,
- the gravitational field the object is in. 
▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂☘️
Hope it helps ~
 
        
                    
             
        
        
        
Answer:
False 
Explanation:
Its the sum of those not the difference between them