Visualizing Free body diagrams? solved, thanks tiny-tim and doc Al! I ran into a problem in my HW, I found the answer but I just have a hard time seeing as to WHY my answer is correct. http://i163.photobucket.com/albums/t288/Kyin1/1-6.jpg Thats the problem and my FBD is for block B. My FBD are the ones I did in red/blue w/ paint. The red means I am pretty sure that is what is given / correct. The lines in blue are what I believe I can maybe do in order to make more right triangles to help me find magnitudes of forces. If my FBD was not clear enough please let me know so I can fix. I didn't put what forces are acting on what because I think my problem is seeing that the lines in black (according to my answer) is equal to the magnitude of my Weight force? Is there a better way of seeing why my answer is the way it is? Thank you for your time.