Hi! Can someone give me a general idea of how I do this? In my lab today we a pulley system with two spring balances attached to a long sting. We had to do several configurations and measure the angle and record the reading on the spring balances. Could someone guide me as to how to do the calculations for this? For example: A 150 g weight was attached to the string Spring balance reading string 1 (the magnitude I guess): 120g Angle string 1: 65 degrees Spring balance reading string 2: 20g Angle string 160 degrees I'm supposed to see if all the forces add up to zero. I'm not quite sure if my lab group did the lab right, but could someone please help me figure out the calculation setup for this. Thank you so much!