Rotational Inertia

Discussion

concept translation connection rotation
cause of acceleration ∑ F   τ =  r × F ∑ τ  
resistance to acceleration m   I =  ∑ ri2mi = ∫ r2 dm I  
newton's second law ∑ F =  m a     ∑ τ =  I α
Translational and rotational quantities compared