[例4] 人* K · C: C3 School of Mechanical Engineering ME369-lecture 2.1 Shanghai Jiao Tong University Fall 2015 静态平衡(static equilibrium) k g 2k S ME369-lecture 2.1 Shanghai Jiao Tong University Fall 2015 77 BE315-Lecture 2.1 Fall 2011 ME369-lecture 2.1 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University [例4] BE315-Lecture 2.1 Fall 2011 ME369-lecture 2.1 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 静态平衡(static equilibrium)