中国石油大学工程力学2014在线作业1（Engineering mechanics of China University of Petroleum, 2014, online work, 1）.docVIP

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中国石油大学工程力学2014在线作业1（Engineering mechanics of China University of Petroleum, 2014, online work, 1）.doc

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中国石油大学工程力学2014在线作业1（Engineering mechanics of China University of Petroleum, 2014, online work, 1）

中国石油大学工程力学2014在线作业1（Engineering mechanics of China University of Petroleum, 2014, online work, 1） First questions Your answer: B Topic score: 0.5 This score: 0.5 Comment: the difference in material mechanics, theoretical mechanics is the research object. Second questions Your answer: B Topic score: 0.5 This score: 0.5 Comment: To investigate You Lis axioms of statics, transmissibility can be. Third questions Your answer: B Topic score: 0.5 This score: 0.5 Note: investigation from two axioms of statics, force equilibrium axiom can be. Fourth questions Your answer: C Topic score: 0.5 This score: 0.5 Comment: To investigate three common binding properties of anti force provided. Fifth questions Your answer: B Topic score: 0.5 This score: 0.5 Note: the investigation of concepts and related theorems of moment. Sixth questions Your answer: B Topic score: 0.5 This score: 0.5 Note: inspection of the two component force judgment method. Seventh questions Your answer: A Topic score: 0.5 This score: 0.5 Note: using the properties of components can be three. Eighth questions Your answer: D Topic score: 0.5 This score: 0.5 Note: according to the force system to a point can be simplified. Ninth questions Your answer: C Topic score: 0.5 This score: 0.5 Note: according to the properties of couples available. Tenth questions Your answer: A Topic score: 0.5 This score: 0.5 Note: the equivalent force system and synthetic study, plane force system can be simplified into a force. Eleventh questions Your answer: B Topic score: 0.5 This score: 0.5 Note: the force system to the point O, can be a principal vector (Rx, Ry) and a principal moment MO, because the original and equivalent force system, their principal moment A, B, C three are respectively MA, MB and MC, which can make a list of the three equations, which are solved Rx, Ry and MO, then we can calculate the magnitude and direction of the force. Twelfth questions Your answer: D Topic score: 0.5 This score: 0.5 Comment: To investiga