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.
Gravity exerts a force of attraction between any two objectsâthe Earth and you, for example. Its strength depends on the amount of mass (matter) each one has and on how far apart their centers are. The more mass something has, the more gravity it has.