喜讯:2019年高考真题——理综物理(全国卷Ⅲ) 第16题 共命中12分2019/8/1 18:33:00 阅读 参与讨论()

喜讯:2019年高考真题——理综物理(全国卷Ⅲ) 第16题 共命中12分

喜讯:2019年高考真题——理综物理(全国卷 16  共命中12

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【高考真题】

16.用卡车运输质量为m的匀质圆筒状工件,为使工件保持固定,将其置于两光滑斜面之间,如图所示。两斜面I、Ⅱ固定在车上,倾角分别为30°60°。重力加速度为g。当卡车沿平直公路匀速行驶时,圆筒对斜面I、Ⅱ压力的大小分别为F1F2,则

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【答案】

D

【命中试题】

1.【四川省成都市2019届高三下学期第二次诊断性测试理科综合物理试题】

http://ks5u.com/down/2019-5/13/3668591.shtml

3.如图,半圆球P和竖直挡板固定在水平面上挡板与P相切,光滑小球Q静止在P和挡板之间。已知Q的质量为mPQ的半径之比为4:1,重力加速度大小为g。则QP的压力大小为

高考资源网(ks5u.com),中国最大的高考网站,您身边的高考专家。

A. 高考资源网(ks5u.com),中国最大的高考网站,您身边的高考专家。                                                                     B. 高考资源网(ks5u.com),中国最大的高考网站,您身边的高考专家。

C. 高考资源网(ks5u.com),中国最大的高考网站,您身边的高考专家。                                                                      D. 高考资源网(ks5u.com),中国最大的高考网站,您身边的高考专家。

【答案】B

2.【吉林省名校2019届高三下学期第一次联合模拟考试物理试题】

http://ks5u.com/down/2019-4/29/3641952.shtml

3.如图所示,固定的木板与竖直墙面的夹角为θ,重为G的物块静止在木板与墙面之间,不计一切摩擦,则

高考资源网(ks5u.com),中国最大的高考网站,您身边的高考专家。

A. 物块对木板的压力大小为高考资源网(ks5u.com),中国最大的高考网站,您身边的高考专家。

B. 物块对木板的压力大小为Gcosθ

C. 物块对墙面的压力大小为Gtanθ

D. 物块对墙面的压力大小为Gsinθcosθ

【答案】A

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