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 and Weight. Weight is the force of gravity exerted upon a mass. Weight and mass are related, but are not the same. An object's weight depends upon two things: 1. its mass. 2. the acceleration of gravity in the part of the. universe it occupies.