coligro

I think I could solve it at my own. a) FRes=FG9kg-FG6kg-FF= 9,81 N a=FRes/25kg=0.3924 m*s-1 b) FT= 9kg*9.81-9kg*0.3924m*s-1= 85N c) FT=6kg*9.81-6kg*(-0.3924m*s-1)= 61N Have I done everything correct?

I do understand number 8a). However how can I calculation the tension in a cord? Where do I find the variables and what equation do I have to take?

I couldn't solve this problem. Could anybody help me with a solution process that I can comprehend your thinking. Thank you.