text: the first answer is partially correct.\n\nThe max tension is when the bob is straight down, but note that that the velocity is also a maximum at this point. There is a normal acceleration of v*v/r which increases the tension. The tension is m(g + v*v/r). Note v is velocity and can be found from conservation of energy. r is the length of the rope.\n\nThe minimum tension has no velocity component and comes only from the gravity component as the person above points out.