physic
posted by kerat .
A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9×107m . The magnitude of the gravitational force exerted on the satellite by the planet is 140N .
What would be the magnitude of the gravitational force exerted on the satellite by the planet if the radius of the orbit were increased to 3.2×107m ?

A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9×107m . The magnitude of the gravitational force exerted on the satellite by the planet is 140N .
Part A
What would be the magnitude of the gravitational force exerted on the satellite by the planet if the radius of the orbit were increased to 3.2×107m ? 
F₁=G•m•M/R₁²
F₂ =G•m•M/R₂²
F₁/F₂=R₂²/R₁²
F₂=F₁•R₁²/R₂²= …