Alright, so I have this sheet for homework and I'm not sure where to start. Incase you are unable to see, the questions say: a) What is the acceleration of the system and the tension in each rope if the girl lifts with a force of 100.0N? b) What is the force that she pulls with if T3 (bottom bucket) = 15.0N? http://imageshack.us/photo/my-images/696/photowda.jpg/ To begin, I know I need to utilize the second law's equation F=ma, but I do not know which masses I am supposed to use to find Fg = gm. I need serious help, I am completely confused!