http://mblogthumb1.phinf.naver.net/MjAxODAxMDFfMTA1/MDAxNTE0Nzk3NzgzMTE4.SXTAqV1xUUivThXFTXD8PziwX6s-Y_p00j22AZCez9og.DF7bAc4jm_FjPNH23EOQ5_gE-28MZ3LH1NJukwKHahcg.GIF.seolgoons/Pendulum_animation.gif?type=w2이렇다네요 이유는 나도몰름
댓링으로 해야지
http://mblogthumb1.phinf.naver.net/MjAxODAxMDFfMTA1/MDAxNTE0Nzk3NzgzMTE4.SXTAqV1xUUivThXFTXD8PziwX6s-Y_p00j22AZCez9og.DF7bAc4jm_FjPNH23EOQ5_gE-28MZ3LH1NJukwKHahcg.GIF.seolgoons/Pendulum_animation.gif?type=w2
장력이랑 중력 벡터합인가 - dc App