题库网 (tiku.one)

 找回密码
 立即注册

 

      

上传图片附件

未使用图片

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp,上传完成后会在上方生成预览,用鼠标连续双击缩略图,或拖动缩略图,该图片就被绑定至本题,显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片,绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


习题练习:Centre of mass system

 作者: admin 发布日期: 2024-08-07 17:28   总分: 5分  得分: _____________

答题人: 游客未登录  开始时间: 24年08月07日 15:56  切换到: 整卷模式

标记此题
1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.10: A firecracker explodes while in flight al.uc-pgtdj *lm6ot , k4,z6wvsong a parabolic path and fragments from it traveling all 4 cktd66 pwjl.-v *zsg,t,omu directions. After the explosion, the center of mass of the firecracker

参考答案:    

标记此题
2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.20: A large wedge rests on a horizontal frictionless surface, as shownv/4/qo2z6y/axffs. )ohfe m)7 l hxjt. A block starts from rest and slides down the inclined surface of the wedge, which is rough. During v/ot x/q/as)2oylfef .z 6)4jxfh7 mhthe motion of the block, the center of mass of the block and wedge system


参考答案:    

标记此题
3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.34: A 4.0 kg object in deep space moves at a constant velo-ufg3* yu b-psh:zvq. wd23r fcity of 10 m/s along the +x axis. The object suddenly explodes into 2 equal mass pieces. Immediately after the explosion, one piece is now moving directly along the –y axis with a speed of 8.0m/s. What was the sg dpur*u3 -y2:3hszq-f f .wbvize of the impulse (in proper MKS units) provided to this piece now moving along the –y axis from the explosion?




参考答案:    

标记此题
4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.26: A 10.0 kg mass moves to the r;d3hqj jd.)8nuxwf(m hp4v+ iight at 8.00 m/s. A 5.0 kg mass moves to the left at 7.00 m/s. With what speed does the center of mass of this ti4;w8.hmdhq(+dvj3jxpf ) un wo-mass system move?

参考答案:    

标记此题
5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.34: A 9.20 m long uniform plank rests on a frictionleuhm*ai 8vb o1qm6: cj0ss ice pond. A 52 kg box rests on the plank’s left end while a 71 kg person stands at the plank’s right end. After the person walks t b1q*o6a: hmuvc jmi08o the left on the plank and stands at the same location as the box, the plank has slid 3.84 m to the right relative to the pond’s shore. Which one of the following choices best represents the mass of the plank?



参考答案:    

总分:5分 及格:3分 时间:不限时
未答题: 已答题:0 答错题:
当前第 题,此次习题练习共有 5 道题
本平台(https://tiku.one/)支持练习,作业与考试(自动评分)三种模式,群组成绩统计排序导出,题目动态变量实现同卷千人千题
如果您对本系统感兴趣,想加入我们或者想进行任何形式的合作,请加微信 skysky1258

浏览记录|手机版首页|使用帮助|题库网 (https://tiku.one)

GMT+8, 2025-10-29 01:27 , Processed in 0.109030 second(s), 31 queries , Redis On.