1. The problem statement, all variables and given/known data A bob suspended from a frame settles into a steady position relative to the frame as the frame slides down an inclined plane. What angle does the bob make with the during the slide? Here is the illustration from the book: [Broken] 2. Relevant equations Unknown. F=ma? 3. The attempt at a solution I don't really have any idea how to start this problem. I thought the first step would be to calculate that the acceleration of the frame = g*sin(theta), but I don't really know where to go from there. Any ideas?