题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131543-85244.png)
(1) 塑胶炸药爆炸后瞬间A与B的速度各为多大?
(2) 在A追上B之前弹簧弹性势能的最大值;
(3) A与B相碰以后弹簧弹性势能的最大值.
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131543-35402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131543-40112.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131544-95435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131544-36789.png)
核心考点
试题【如图所示,在足够长的光滑水平轨道上有三个小木块A、B、C,质量分别为mA、mB、mC,且;mA=mB =" 1.Okg" ,mc = 2.O kg,其中B与C用】;主要考察你对动量守恒定律等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-61102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-61102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-20838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-61102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-39523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-54255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-65492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-12188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-53977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-36276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-53977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131538-59275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-20838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131538-82311.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-20838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131538-59388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-61102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-65492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-61102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-54255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131538-69671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-61102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-54255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-65492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-36276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-61102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-65492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-61102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-54255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131538-86649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-61102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-54255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-65492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131538-86649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-54255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-65492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131537-65492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131536-20838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131538-86649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131539-99580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131529-54263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131530-54395.png)
①子弹穿出物块时物块的速度大小。
②子弹穿出物块后,为了保证物块不从木板的B端滑出,木板的长度至少多大?
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131530-78937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131524-43450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131520-39960.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131503-45131.jpg)
求:(1)摆球上升的最大高度;
(2)摆球在最低处时速度的大小.
![](http://img.shitiku.com.cn/uploads/allimg/20200109/20200109131503-46697.png)
最新试题
- 1 You should not ______ your mistakes if you want to make gre
- 2在探究“合力做功和物体动能变化之间的关系”的实验中,某同学的实验设计方案如图甲所示.则:(1)该实验用钩码的重力表示小车
- 3给下列加粗的字注音。不亦说乎( )可汗大点兵( )( )称前时之闻( )携拯如初( )默而识之( )尊君在不( )环谒于
- 42013年8月13日是我国的七夕节,这是中国传统节日中最具浪漫色彩的一个节日。全国各地纷纷举办多种形式的活动进行庆祝。这
- 5初中生张某在家不做家务,而且常常以各种借口逃课。当父亲批评他时,他说:“我是未成年人,还不是公民,不需要履行义务。”张某
- 6函数y=tan(x+π4)的定义域为______.
- 7已知函数f(x)=x3+ax在(-∞,-1)上为增函数,在(-1,1)上为减函数,在(1,+∞)上为增函数,则f(1)的
- 8我国目前的小康是低水平,不全面,发展不平衡的,因此,我们建设惠及十几亿人口的更高水平的小康社会,使___________
- 9将下列短语按结构类型分成三组。①最后一次演讲 ②爸爸的花儿落了 ③追求人类更大的自由 ④与朱元思书⑤唐雎不辱使命 ⑥我用
- 10如图所示,M是一小型理想变压器,接线柱a、b接在电压u=311sin314t(V)的正弦交流电源上,变压器右侧部分为一火
热门考点
- 1有关地理区域差异含义的正确叙述是① 区域有一定面积、形状、范围或界线 ② 区域特性与其区位没有关系③区
- 2小明和小张两人练习电脑打字,小明每分钟比小张少打6个字,小明打120个字所用的时间和小张打180个字所用的时间相等。设小
- 3观察下列式子:,,,…,根据以上式子可以猜想:( )。
- 4太阳能是______能源(选填“可再生”或“不可再生”).太阳能热水器将太阳能______(选填“转化”或“转移”)为内
- 5如图,∠AOB=30°,P为OA上的一点,且OP=5cm,若以P为圆心,r为半径的圆与OB相切,则半径r为[ ]
- 6直角三角形最小的一个外角为 度.
- 7实验室需要0.1mol /L氢氧化钠溶液100mL,现有2mol /L氢氧化钠溶液。(1)这100ml的溶液中含有的溶质
- 8用显微镜观察植物切片的同一部位,下列哪种目镜和物镜的组合,在视野中所看到的细胞数目最多( )A.目镜10×;物镜10×
- 9From my point of view, the theory that ______ by the scienti
- 10(2009年上海市)19.计算:.