# Abstract

The General Relativity understands gravity like inertial movement of the free fall of the
bodies in curved spacetime of Lorentz. The law of inertia of Newton would be
particular case of the inertial movement of the bodies in the spacetime flat of Euclid.
But, in the step, from general to particular, breaks the law of inertia of Galilei since
recovers apparently the rectilinear uniform movement but not the repose state, unless
the bodies have undergone their collapse, although, the curved spacetime becomes flat
and the curved geodesies becomes straight lines. For General Relativity is a natural law,
within of a gravitational field, the accelerated movement of the bodies, that leads to that
a geometric curvature puts out to the bodies in such geodesic movement.
In this paper this error of General Relativity, like generalization of the law of inertia of
Galilei, is examined and it is found that it is caused by suppression of mass and force
that allows conceiving acceleration like property of spacetime. This is a mathematical
and non-ontological result. Indeed, mass and force are the fundament that the
gravitational acceleration is independent of the magnitude of mass of the bodies but
gravity not of the mass and the gravitational force. The action of the gravity force, on
inertial and gravitational masses of a body, produces mutual cancellation during its free
fallen but too its weight when this cease. By means of the third law of Newton it shows
that gravity is a force since weight is caused by gravity.