There are two blocks, one on top of the other. The top block has a mass of 5kg and the bottom block has a mass of 12kg. The bottom block rests on a frictionless plain, but the coefficient of friction between the two blocks is 0.6. What minimum force applied on the bottom block is required to get the top block to move relative to the bottom block?
I don't know why I'm having so much trouble with this problem. I thought that the top block might as well be on a surface in which the coefficient of friction was 0.6 and the answer would just be solving for F_static in F_static = 0.6 (5)(9.8) but the professor told me that was wrong and he didn't give me an intuition as to why my thinking was wrong.