For 10 points, name this physical property that, in Newton's first law, is defined as a body's tendency to stay at rest before acted upon by an outside force.
This word, rather than "gravitational," is used as an adjective to describe the mass term in Newton's Second Law, and it also describes moving reference frames that do not accelerate. This property, in the absence of a net force, is exemplified by the center of mass of a body moving at a constant velocity. For 10 points, name this physical property that, in Newton's first law, is defined as a body's tendency to stay at rest before acted upon by an outside force.
This word, rather than "gravitational," is used as an adjective to describe the mass term in Newton's Second Law, and it also describes moving reference frames that do not accelerate.
{inertia} [accept word forms like {inertial}; do not accept moment of inertia]