Newton's Law of Universal Gravitation: FG= Fg=Gm/r2

[isyang94]

Hello, i am so confused
Newton's universal gravitation states FG= Gm1m2/r squared and in this case FG stands for the force of gravitational attraction between any 2 objects, but why is Fg (gravitational field strength) equaled to fg=Gm/r squared? why are FG and Fg used interchangeably? i do not understand the whole concept
thanks

 

[Doc Al]

You already have a thread open on that same topic: https://www.physicsforums.com/showthread.php?t=491937