The rotational equation of motion states that the sum of moments due to all external loads about the mass center ( MG) equals _____________. Group of answer choices IG ( the product of the mass moment of inertia about an axis passing through the mass center of the body and the body's angular acceleration) IGa ( the product of the mass moment of inertia about an axis passing through the mass center of the body and the body's linear acceleration) ma ( the product of the mass of the body and the body's linear acceleration) m ( the product of the mass of the body and the body's angular acceleration)