1. The problem statement, all variables and given/known data a)The angle that the string of a long pendulum makes with the vertical is shown as a function of time. What is the angular frequency of the pendulum? b)What is the amplitude of the pendulum's motion, in meters? 2. Relevant equations Angular frequency=sqrt(g/L) 3. The attempt at a solution im trying to find the length of the pendulum from the graph provided but im not sure how to do that.. By looking at the graph i think the period is 6 seconds,and the amplitude is 1deg.. but im not sure how to proceed from here. Any advice would be helpful, Thanks!