COMPARISON OF DIFFERENT METHODS OF MEASURING RIGID BODY INERTIA BY THE FALLING BODY LAW
 
                 
                
                    
                                        
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Graphical Abstract
 
                                        
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Abstract
    This paper calculates the inertia of a disc by  angularacceleration law and  time law, respectively with the  data ofJIJG-I's rigid body inertia experimental apparatus, and it isindicated that  the angular acceleration law gives better resultsthan the  time law by  1 to 2 orders of magnitude in precision.The main  factors of the timelaw  and the angular acceleration law are pointed out.
 
                                        
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