一小球沿光滑斜面向下运动,用每隔0.1s曝光一次的频闪照相机拍摄下不同时刻小球的位置照片如图所示,选小
(1)根据逐差法求加速度有:a=(s3?s1)+(s4?s2)4T2=(10.4来自0+11.50?8.20?9.30)×10?24×(0.1)2m/s2=1.10m/s2(2)...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
一个小*沿光滑斜面向下运动,用每隔 1/10 s曝光一次的频闪照相机拍摄下不同时刻小*的*置照片如图7所示,选小*的五个连续*置*********进行测量,测得距离s_1、 s_2、s_3、s_4的数据如表格所示. (1)小*沿斜面下滑的加速度的大小为______m/s^2 (2)根据以上数据求出
解:(1)由逐差法:x3-x1=*****=1.11 m/s2 x4-x2=2a2T2=1.360问答095 m/s2则:≈1.11 m/s2(2)某段时间内的平均速度等...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
一小球沿光滑斜面向下运动,用每隔0.1s曝光一次的频闪照相机拍摄下不同时刻小球的位置照片如图所示,选小
(1)根据△x=aT2,解得a=△xT2=1.10×10?20.01m/s2=1.10m/s2.(2)vB=s1+s22T=(8.20+9.30)×10?22×0.1m/s=0....
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
一小球沿斜面向下运动,用每隔0.1s曝光一次的频闪照相机拍摄下不同时刻小球的位置照片如图所示,选小球的
根据匀变速360问答直线运动的推论公式△x=磁总脱袁座运留南须王aT2可以求出加速度的大小界课方加项交盾属被,得:s4-x2=2a1T2s3-s1=2a愿包2T2为了更加准确的求...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
一小球沿光滑斜面向下运动,用每隔0.1s曝光一次的频闪照相机拍摄下不同时刻小球的位置照片如图所示,来自选小
(1)根据逐差法求加速度有360问答:a=(s3-s1)+(s4-s2)4T2=(10.40+11.50-8.20-9.30)×10-24×(0.1)2=1.10m/s2(2)某...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
(9分)一小球沿光滑斜面向下运动,用每隔0.1s曝光一次的频闪照相机停浓经联齐滑拍摄下不同时刻小球的位置来自照片如图所示
⑴1.10m/s2.⑵⑶能,由得和已知本题考查利用频闪照片测量加速度大小的实验(1)加速度可由逐差法求得能孩确旧金鲁="1.10"m/s2.⑵D点速度根据中间时刻的瞬时速度等于平...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
一小*封日频展客安导沿光滑斜面向下运动,用每印财土龙隔s曝光一次的频来自闪照相机拍摄下不同时刻小*的*置照片如图所示,选小*的五个连续*置*********进行测量,测得距离s1、s2、s3、s4的数环纪丝的安散据如表格所示。(1)小*沿斜面下滑的加速度的大小为__________m/s2;(2)根据以上数据求出小*在*置A的速度___
试题**:(1)1.1(2)0.765,1.205
一小*沿光滑斜面向下运动,用每隔0.1s曝光一次的频闪照相机拍摄下不同时刻小*的*置照片如图所示,选小*的五个连续*置*********进行测量,测得距离s1、s2、s3、s4的数据如表格所示。
(1)小*沿斜面下滑的加速度的大小为_____________m/s2。(2)根据以上数据求出小素高叫李*在*
试题**:(1)1.10(2)0.765,1.205(3)能,由得,a和g已知
小球沿光滑斜面向下运动,用每隔0.1s曝光一次的频闪照相机拍摄下不同时刻小球的位置照片如图所示,选小球
(1)根据中间时刻的瞬音议犯身选抓裂采时速度等于平均速度得:vB=x1+x22T=0.来自082+0.0930.2=0.875m/svD=x3+x42T=0.104+0.1140...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
向上与向下 为话题的作文
雨蓬的设计是一个很仍各第被宽的话题,结构布置技底假宜粉免安杆审派境、截面选择、支座条件、荷载计算及组合、节点构造、排水等等,很难全讲清楚。我主要针对非**雨蓬中几个有争议的问题表...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
弹球为什么可以弹起来?
动能或其他势能转变脚室呢样为弹性势能储存起来,弹性势能释放又再转变会动能,於是球又能运动,但方向与原来相反,即我们所说的反弹。举个例子:你从高处跳下,落地时你的腿会少向下蹲,然後...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
英语文化**包含什么
在美国有这样一个尽人皆知的句子:“Whenyou’redown,youarenotnecessarilyout.”但是许多Englishlearners却来自对其含义不甚了了。原...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)
天花板温度吃排你伟增宁根称烧力体高于房间温度怎么来自回事?
这个问题的精髓在于,夏天是天花板温度低,空气温度高,属于冷可乎罗给祖盐看革展面向下。冬天天花板温度高,空气温度低,属于热面向下。两种情况下努塞准则数关联式不同。冷面向下情况轴凯装...
展开阅读全文 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAG1BMVEUAAABuk71wj79vkr1wj79wn79vlL1vk75vk73EmhGbAAAACHRSTlMA0BDfIBDfv/U9wHQAAABISURBVBjTY6AlYBOC0OEJQIK9UQHEZpUQAJJMEmCpQIiYIohiBQlBpKASUCmwBETKQiiw2QFmunOjhAncKhYLkARcCihBWwAA5n0JqdkCrS4AAAAASUVORK5CYII=)
收起 ![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYBAMAAAASWSDLAAAAHlBMVEUAAABuk71wj79vlL1wl79wn79vkr1vlL5vk75vk71klGr6AAAACXRSTlMA0BDfIBDfv7/eQcl1AAAARklEQVQY02OgNXA2QbBZLCc7ICQmSpogJIQUJytAOYETFZgkhSBsVhBDcaICRAJEA6XgEjApRhAJkmoAkmxFEK2KCQw0BAA5Lgp0ywp4owAAAABJRU5ErkJggg==)