精品解析:2025年高考重庆卷物理真题(1-11,15题)(原卷版)
1.现代生产生活中常用无人机运送物品,如图所示,无人机携带质量为m的匀质钢管在无风的空中悬停,轻绳M端和N端系住钢管,轻绳中点O通过缆绳与无人机连接。MO、NO与竖直方向的夹角均为60°,钢管水平。则MO的弹力大小为( )(重力加速度为g)A.2mgB.mgC.D.2.易碎物品运输中常采用缓冲气袋减小运输中冲击。若某次撞击过程中,气袋被压缩(无破损),不计袋内气体与外界的热交换,则该过程中袋内气体(视为理想气体)( )A.分子热运动的平均动能增加B.内能减小C.压强减小D.对外界做正功3.“魔幻”重庆的立体交通屋叠交错,小明选取其中两条线探究车辆的运动。如图所示,轻轨列车与汽车以速度分别从...
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