It's never been measured, but it is assumed to be the same as the speed of light.
5.401.098 km
weight
found gravitional force
Yes.
the three types of energy ;the magnetic force;gravitional force;wind force
It isn't.
Isaac newton.
being spun around in circles
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.
At a larger distance, the gravitional force gets smaller.
Mass and Distance