See attachment there are 2 pipes viewed from the side, pipes A and B. Their masses are 80lb and 60lb. how much force must be applied to pipe B to make the pipes not move. assume that the pipes can mov

See attachment

there are 2 pipes viewed from the side, pipes A and B. Their masses are 80lb and 60lb.

how much force must be applied to pipe B to make the pipes not move. assume that the pipes can move freely and there is standard gravity.