1. The problem statement, all variables and given/known data A simple pendulum is pulled sideways from the equilibrium position and then released. I figured this part out - Immediately after the pendulum is released, the net force acting on it is directed: it is perpendicular to the string (I REASONED THAT THE DIRECTION OF ACCELERATION(PERPENDICULAR TO THE STRING) IS THE DIRECTION OF THE NET FORCE) but next part to this question of the question says "My answer to part 1 is justified because:" AND the answer is " The centripetal acceleration is zero" I don't understand how the centripetal force is zero? if it is zero why the circular motion? Does tangential force alone causes it?