answers: tensor
context: of inertia. The logical conclusion of special relativity was that if mass exhibits the principle of inertia, then inertia must also apply to energy. This theory, and subsequent experiments confirming some of its conclusions, have also served to radically expand the meaning of inertia to apply more widely and to include inertia of energy. Physicists and mathematicians appear to be less inclined to use the popular concept of inertia as "a tendency to maintain momentum" and instead favor the mathematically useful definition of inertia as the measure of a body's resistance to changes in velocity or simply a body's inertial </s> the formula_90-axis when the object rotates around the formula_91-axis. The components of tensors of degree two can be assembled into a matrix. For the inertia tensor this matrix is given by, It is common in rigid body mechanics to use notation that explicitly identifies the formula_90, formula_91, and formula_89-axes, such as formula_307 and formula_308, for the components of the inertia tensor. The use of the inertia matrix in Newton's second law assumes its components are computed relative to axes parallel to the inertial frame and not relative to a body-fixed reference frame. This means that as the body moves the </s> a moment; commonly used quantities include forces, masses, and electric charge distributions. In its most simple and basic form, a moment is the product of the distance to some point, raised to some power, multiplied by some physical quantity such as the force, charge, etc. at that point: where formula_2 is the physical quantity such as a force applied at a point, or a point charge, or a point mass, etc. If the quantity is not concentrated solely at a single point, the moment is the integral of that quantity's density over space: where formula_4 is the distribution of the
question: moment of inertia is which type of quantity