1. The problem statement, all variables and given/known data A window washer pulls herself up using a bucket that she stands in and a pully system that she pulls down on a cord to go up. How hard must she pull in order to go up slowly at a constant speed? assuming pulley frictionless and massless 2. Relevant equations f=ma 3. The attempt at a solution I set up a FBD but apparently it was wrong and i don't fully understand why. I set it up as the bucket+human = T - mg = ma and the other side of the pull the cord which is Fh - T = ma Fh = Force by hand In the book they just say its 2T - mg = ma which I get my Fh is = to T but I don't see how the pulley makes it 2T. It does make some sense as it is easier to pull down then pull up but.. i can't wrap my head around it lol any help?