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.
By Anne Marie Helmenstine, Ph.D. The difference between mass and weight is that mass is the amount of matter in a material and weight is a measure of how the force of gravity acts upon that mass. Mass is the measure of the amount of matter in a body.Mass is denoted using m or M.y Anne Marie Helmenstine, Ph.D. The difference between mass and weight is that mass is the amount of matter in a material and weight is a measure of how the force of gravity acts upon that mass. Mass is the measure of the amount of matter in a body.