It is B. false that an instrument used to detect a static electric charge is called an ammeter. It is actually called an electroscope. Ammeter measures current. 
        
                    
             
        
        
        
Answer:
The force exerted by the earth on a body is called gravitational of a body.
i think this is the answer 
 
        
                    
             
        
        
        
If the applied force is in the same direction as the object's displacement, the work done on the object is:
W = Fd
W = work, F = force, d = displacement
Given values:
F = 45N
d = 12m
Plug in and solve for W:
W = 45(12)
W = 540J