1. The problem statement, all variables and given/known data If the period of a 70.8-cm-long simple pendulum is 1.91 s, what is the value of g at the location of the pendulum? 2. Relevant equations I don't know of any that relate the period, radius and the value of g 3. The attempt at a solution The thing is, I'm completely clueless. I'm guessing it has something to do with force, because how else would g be related to the equation? And... probably angular velocity. But I am so clueless.