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.
This is because mass is defined as the amount of material an object contains, and that doesn't change whether the object is on Earth, on the Moon, or anywhere in space. Now, weight and mass are linked in the following way: the weight is obtained by multiplying the mass by the value of the gravitational acceleration. That means that for an object of a given mass, the stronger the gravitational attraction, the larger its weight (this is why objects weigh 6 times more on Earth than on the Moon, and weigh nothing in empty space).