noun
gravitational mass
Physics term; the mass of an object as measured by its gravitational interaction with other objects. Contrasts with inertial mass (慣性質量).
重力質量と慣性質量は等価であると一般相対性理論は仮定している。
General relativity assumes that gravitational mass and inertial mass are equivalent.
Inertial mass, the mass that determines an object's resistance to acceleration. In classical physics, gravitational mass and inertial mass are distinct concepts but experimentally equivalent.
Compound of 重力 (gravity) and 質量 (mass). A straightforward technical term.