Two weights are connected by a very light flexible cord that passes over a 50.0 N frictionless pully of radius .300 m. The pulley is a solid uniform disc connected by a hook to the ceiling. What force does the ceiling exert on the hook?
(In the picture shown is the pulley and two weights hanging on each side. One weight is 75 N, on the other side the weight is 125 N)
The Attempt at a Solution
I know the force exerted on the hook will be the total net downward force (or the opposite of it). I also understand that the 125 n wieght on one end of the pulley "makes lighter" the 75 n weight, and vice versa. What I'm not sure of is the relationship how.