It's never been measured, but it is assumed to be the same as the speed of light.
The force of attraction between masses is called gravitional force or gravity
5.401.098 km
weight
Yes.
found gravitional force
the three types of energy ;the magnetic force;gravitional force;wind force
Centripetal Force.That force is, of course, supplied by gravitional force.
being spun around in circles
Isaac newton.
It isn't.
Gravitational force is the atraction of all matter to all other matter
Gravitational force depends on the masses involved, and on the distance. There is no known way to "block" the gravitational force.