1. The problem statement, all variables and given/known data A pendulum consists of a bob of mass A hanging from a string of non-zero mass m. Its maximum displacement is p/4 [whatever that p means, I do not know. the question writers do a poor job of writing questions]. What is true of the tension in the string? 1) It is greatest at the top. 2) It is greatest at the bottom. 3) It is uniform throughout. 4) It does not vary when the pendulum is put in motion. 5) It is greatest when the pendulum is it its maximum amplitude. 2. Relevant equations No equations 3. The attempt at a solution I attempted this by putting down 2, but the authors believe it is 1. Here's how I thought of it. Sum of centripetal forces = m * centripetal acceleration T - mg [at bottom, maybe I need a sine or cosine term to account for angle] = m (v^2 / r) T = m ( v^2 /r ) + mg. Thus, the T would be greatest at the bottom as the speed of a pendulum bob is maximum at the bottom [maximum kinetic energy], according to my logic. How does this work, why are the writers right, and why is my approach wrong? Thanks in advance for the assistance!