您所在的当前位置：高中物理试题 >

动量定理

> 在光滑水平面上，两球沿球心连线以相等速率相向而行，下列现象可能的是（　　） A．若两球质量相等，碰后以某一相等速率反向而行 B．若两球质量相等，碰后以某一相等速率同向而行 C．若两球质量不同，碰后以某一相等速率反向而行 D．若两球质量不同，碰后以某一相等速率同向而行

问题：

发布时间：2024-09-09

在光滑水平面上，两球沿球心连线以相等速率相向而行，下列现象可能的是（　　）

A．若两球质量相等，碰后以某一相等速率反向而行

B．若两球质量相等，碰后以某一相等速率同向而行

C．若两球质量不同，碰后以某一相等速率反向而行

D．若两球质量不同，碰后以某一相等速率同向而行

参考答案：

提问用户：ny***Ki1

可能感兴趣的题目：

1 _______ sunny day it is! A.How B.What C.What a D.How a
2 七选五阅读。根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。 Success story Yesterday afternoon Frank Hawkins was telling me about his experiences as a young man.Frank is now the head of a very large business company. 1 . It was his job to repair bicycles 2 . He saved money for years and in 1938 he bought a small work-shop of his own.During the war Frank used to make spare parts for aeroplanes. 3 .By the end of the war, 4 which employed seven hundred and twenty-enght people. Frank smiled when he remembered 5 . He was still smiling when the door opened and his wife came in. She wanted him to repair their son"s bicycle! A. At that time he had two helpers B. But as a boy he used to work in a small shop C. He wanted to repair their son"s bicycle D. And at that time he used to work fourteen hours a day E. His hard early years and the long road to success F. The small work-shop had become a large factory G. He wanted to succeed.
3 读“东北地区中、西部的草业—畜牧—加工业复合发展模式图”，完成：为实现东北地区农业的可持续发展，今后东北西部草原地区农业发展的方向是 A．以增强抗衡国外农产品进入国内市场能力为重点，建设绿色食品基地 B．大力发展生态农业和舍饲畜牧业，做好生态建设和增加农民收入的工作 C．强化人工草地建设，发展草业经济，可减缓退耕、退牧工作的实施 D．大力发展特色农业和特产品配套加工业
4 y=（sinx+cosx） 2-1是（　　） A．最小正周期为2π的偶函数 B．最小正周期为2π的奇函数 C．最小正周期为π的偶函数 D．最小正周期为π的奇函数
5 自20世纪70年代以来，我国共减少出生人口约3亿人，主要得益于 A.经济发展 B.计划生育政策 C.卫生事业发展 D.科技进步
6 子弹从枪膛里射出来以后继续飞行，这是由于 A.子弹受到一个向前的推力 B.子弹具有惯性 C.子弹的惯性大于受到的阻力 D.子弹受惯性力作用
7 Teachers should _____ on their students the value of hard work. A．remind B．inspire C．encourage D．impress
8 阅读理解。 Li Daiyu and her cousin Liu Qian were on a trip to Canada to visit their cousins on the Atlantic coast. Rather than take the aeroplane all the way, they decided to fly from China to Vancouver and to take the train from west to east across Canada in September.The idea that they would cross the whole continent was exciting. Their friend, Danny Lin,was waiting for them at the airport. He was going to take them to catch "The True North", the cross-Canada train.On the way to the station, he told them, "You"re going to see great scenery on your trip. Canada is bigger than the United States. It is second biggest country in the world and as you go eastward, you will see mountains and pass thousands of lakes,forests and wide rivers as well as cities.The idea that you can cross Canada in less than five days is just wrong. It is 5,500 kilometres from coast to coast.Here in Vancouver,you are in the warmest part of Canada.Many people think it is the most beautiful city in Canada,as it is surrounded by mountains on the north and east and the Pacific Ocean on the west.Its population is increasing very rapidly, because the mountain-and-sea city is a very popular place to live in.Even people from Japan come to settle down here. That afternoon on the train the cousins settled down in their seats. They crossed the Rocky Mountains earlier that day and looked out of the windows at the wild scencry.They saw mountain goats and even a grizzly bear.Their next stop would be Calgary.The Calgary Stampede is a famous Western festival, Cowboys come from all over North America to compete in riding wild horses.Many of them have a gift for working with animals and they can win thousands of dollars in prizes. That night,they slept as the train rushed through the night across the top of Lake Superior.through the great forests and southward towards Toronto. 1. How did Li Daiyu and Liu Qian arrive in Canada? A. They sailed across the Pacific Ocean. B. They flew to Vancouver. C. They took a train to Vancouver. D. They flew to the Atlantic coast. 2. Witch order is right of their train trip? A. Vancouver Calgary Lake Superior Toronto B. Toronto Vancouver Calgary Lvake Superior C. Vancouver Lake Superior Calgary Toronto D. Lake Superior Vancouver Cvalgary Tvoronto
9 近年来政府每年出资新建一批廉租房，使城镇住房困难的居民住房状况得到改善，下面是某小区2005-2007年每年人口总数和人均住房面积的统计结果（人均住房面积=该小区住房总面积/该小区人口数，单位：㎡/人）．根据以上信息，则下列说法： ①该小区2005-2007年这三年中，2007年住房总面积最大； ②该小区2006年住房总面积达到172.8万㎡； ③该小区2007年人均住房面积增长幅度比2006年的人均住房面积增长幅度大； ④2005-2007年，该小区住房面积的年平均增长盚Ỵ盛㧀盙膉癖帉癔Ѐ똈౨崿梏ﱦ౨ᓧ梏똈౨嗥梔廄梏펨౨ﱲ౨崿梏ﱦ౨ᓧ梏ﱲ౨ꛜ梐ﱦ౨챰梕짨౨嶪梏˸梖ᕄ梏ﱲ౨˸梖秐梏짨౨秚梏秩梏ﯸ( (戤皪&뫨-䐺癔暼皺뫨-( 뫨-Ā㺣癔뫨-ﯸ뫬-䀷癕뫬-ꊠƖ뫬-㵶癕뫬-쨜౨愈菰ᤠ盛ﳶ౨俵盙ἀ盛垌67姼盙頠(묜-㜴ృ뫬-B盙
10 我国降水时空分配不均的主要原因是 A.地形的影响 B.季风影响 C.纬度影响 D.经度影响