Arm and leg weakness can be caused by a variety of different conditions, some of them temporary and others chronic. Excessive exercise is one cause of temporary fatigue in the major muscle groups, although this is not considered true muscle weakness.
Mass is an intrinsic property of the body and gravity is the force exerted on any body by the things that surround it. Weight, on the other hâ¦and, depends on gravity. It is equal to the product of the mass of the body and the gravitational force acting on it.
Mass gives matter its inertia and the inertia of a lump of matter is the same, no matter where it is in the universe. Weight: Weight is a measure of the heaviness of an object-which is the result of the force of attraction between to lumps of matter (mass).ass gives matter its inertia and the inertia of a lump of matter is the same, no matter where it is in the universe. Weight: Weight is a measure of the heaviness of an object-which is the result of the force of attraction between to lumps of matter (mass).