1. The problem statement, all variables and given/known data Hey guys, I am reading my Physics book, in that specific section it says "the restoring force must be directly proportional to x or (because x=(theta)*L) to theta" 2. Relevant equations 3. The attempt at a solution I have tried to look for that x=(theta)*L relationship online; however, I was not able to find it. I was hoping someone here could explain that relationship to me. Thank you.