题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063549-34166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063550-33486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063550-12587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-82293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-25958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-82293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-25958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-82293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-41374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-25958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-75705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063552-17014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063552-60896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063552-68326.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-82293.png)
(2)P点到D点的水平距离?
(3)解除束缚,使两物块
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-82293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-25958.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063553-10772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063553-52904.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063553-48285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063553-40902.png)
解析
试题分析: (1)设
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-82293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063554-41735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063554-75753.png)
解得:
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063553-10772.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-82293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063554-77220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063554-22907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063555-54353.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063555-71616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063555-98446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063556-54289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063556-30866.png)
解得:
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063553-52904.png)
(3)设弹簧刚解除束缚后,
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-82293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063556-44991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063556-65534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063553-48285.png)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063551-25958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063557-87312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063557-86490.png)
因
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063557-25927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063558-52741.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063558-67879.png)
核心考点
试题【(16分)如图所示,半径的光滑半圆轨道竖直固定在高的光滑水平台上,与平台平滑连接,平台长.可视为质点的两物块、束缚在一起,并静止在平台的最右端D点,它们之间有被】;主要考察你对牛顿第二定律及应用等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063505-14965.png)
A.角速度 | B.线速度 | C.向心力 | D.向心加速度 |
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063356-72694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063356-98296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063357-29604.jpg)
(1)小球运动到轨道最高点C时对轨道的压力大小?
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063357-87309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063357-87309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063328-81406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063328-93630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063328-81406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063328-67675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063329-92728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063329-82657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063329-83784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063329-61633.jpg)
(1)轻绳断时的前后瞬间,小球的加速度? (2)小球落至斜面上的速度大小及方向?
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063320-92925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063320-80146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063320-73749.png)
A.0.4![]() | B.0.3![]() | C.0.2![]() | D.0.1![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063310-71927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063310-72637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063310-40680.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063311-99287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063311-35868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063311-84742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191202/20191202063311-92986.png)
(1)碰后C球平抛的水平位移 (2)碰后瞬间B球的速度 (3)A、B间轻杆的长度
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