Hi. I am having some difficulty with circular motion. An object is spun vertically on a rope a) when would the string be most likely to break? The object would most likely to break when it has the most tension, so at the bottom of the circle it is Ft-Fg=Mv^2/r which is (Ft=Mv^2/r + Fg) while the top is Ft=Mv^2/r - Fg. But I dont understand the concept of this, because if both Tenstion and Gravity are going in the same direction how can it be possible? Thanks.