Answer:
D is the answer
Explanation:
6.45×7.44= 47.98800
Which if we round of we get 48m
 
        
             
        
        
        
Answer:
the spring constant k = 
the value for the damping constant 
Explanation:
From Hooke's Law

Thus; the spring constant k = 
The amplitude is decreasing 37% during one period of the motion


Therefore; the value for the damping constant 
 
        
             
        
        
        
Answer:
Here is the answer.
Explanation:
Balanced forces- they are those forces that produce 0 resultant forces.
therefore, on applying a balanced force on the object, it wouldn't result in any change, as resultant force would be 0.
  
        
             
        
        
        
The reason the efficiency is always less than 100% is because there is always some sort of friction in the machine.
Answer: because of friction