)РA.6个 B.5个 C.4个 D.3个Р9. 质点动力学基本方程为( D )РA、W=FS B、P=MV C、I=FT D、F=maР10. 如图所示,质量为m、长度为Z的均质细直杆OA,一端与地面光滑铰接,另一端用绳AB维持在水平平衡位置。若将绳AB突然剪断,则该瞬时,杆OA的角速度ω和角加速度仅分别为( B )РA. ω=0, α=0 B. ω=0, α≠0 C. ω=10, α=0 D. ω≠0, α≠0Р四、作图题(每小题7分,共35分)Р1、画出下图中杆AB,轮C,以及整体受力图。Р2、拉伸或压缩杆如图所示,试用截面法求杆上各段轴力,并画出各干的轴力图。Р五、计算题Р图示简易起重机用钢丝吊起重力G=2KN的重物,不计杆件自重。摩擦及滑轮大小,A,B,C三处简化为铰链连接,求杆AB和AC所受的力。Р答案:2.73kN -5.28kN(负号表示压力)Р(英文版) Рeasily blame, to prevent the broken window effect. Supervise the leading cadres to play an exemplary role, take the lead in the strict implementation of the < code > and < rule >, lead to safeguard the solemnity and authority of the party discipline, ensure that the party discipline and the laws and regulations for implementation in place. Throughout the discipline in the daily supervision and management
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