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.
Matter is defined as anything that occupies space and has mass. Mass is a measure of an object's inertia. It is proportional to weight: the more mass an object has, the more weight it has.However, mass is not the same as weight.Weight is a force created by the action of gravity on a substance while mass is a measure of an object's resistance to change in motion.atter is defined as anything that occupies space and has mass. Mass is a measure of an object's inertia. It is proportional to weight: the more mass an object has, the more weight it has.