Why suitcases rock and fall over – puzzle solved 科学家解开拉杆箱摇摇欲倒的物理谜题
相信很多人都对下面的这个情景深有体会:为了赶火车或飞机,我们费力地拖着一个两轮拉杆箱向前奔跑,而箱子会左右摇晃,眼看着就要翻倒,着实让人提心吊胆。现在,科学家们已经针对这个令人费解的日常物理难题展开了研究调查,结果他们发现,避免该现象的方法可能和我们的预期有所不同。请听报道。
It’s a common experience when dashing for a train while lugging a two-wheeled suitcase, the bag rocks alarmingly from side to side and threatens to overturn.
To explain why this happens, French researchers studied a model suitcase on a treadmill and did some number-crunching. And it turns out, that rather than slowing down, as you might expect, you should actually speed up to tame your unruly suitcase.
Scientists say, while it’s a fun way to tackle the problem, the study could have applications with other two-wheeled things from trailers to caravans.
词汇表 dashing 猛冲,突然奔跑
lugging 用力拖着
two-wheeled 两轮的
suitcase 行李箱,这里指拉杆箱
rocks 摇晃,摇摆
alarmingly 令人惊慌地,让人担忧地
from side to side 左右、来回地
threatens 预示着、快要发生(不好的事情)
overturn 翻倒
treadmill 跑步机
number-crunching (人或计算机进行的简单而耗时的)数字运算
tame 控制,驾驭
unruly 难控制的,难驾驭的
applications 用途,应用
trailers (卡车后的)挂车
caravans (尤指用汽车拖着走的)旅行房车
测验 请听报道并回答下列问题。
1. What did French researchers do to explain the suitcase puzzle?
2. What applications could the study have, according to the scientists?
3. True or false? To control our suitcases, we should speed up rather than slow down.
4. Which word in the text means ‘to deal with something difficult with determination’?
答案 1. What did French researchers do to explain the suitcase puzzle?
To explain the suitcase puzzle, French researchers studied a model suitcase on a treadmill and did some number-crunching.
2. What applications could the study have, according to the scientists?
The study could have applications with other two-wheeled things from trailers to caravans, according to the scientists.
3. True or false? To control our suitcases, we should speed up rather than slow down.
True. It turns out that rather than slowing down, as we might expect, we should actually speed up to tame our unruly suitcases.
4. Which word in the text means ‘to deal with something difficult with determination’?
Tackle.
新概念英语第一册视频讲解 第97课:A small blue case 一只蓝色的小箱子
新概念英语第一册视频讲解 第81课:Roast beef and potatoes烤牛肉和土豆
新概念英语第一册视频讲解 第57课:An unusual day很不平常的一天
新概念英语第一册视频讲解 第56课:What do they usually do?
新概念英语第一册视频讲解 第96课:What’s the exat time?
新概念英语第一册视频讲解 第91课:Poor Ian可怜的伊恩
新概念英语第一册视频讲解 第78课:When did you...
新概念英语第一册视频讲解 第104课:Too,very
新概念英语第一册视频讲解 第75课:Uncomfortable shoes不舒适的鞋子
新概念英语第一册视频讲解 第102课:He says he...
新概念英语第一册视频讲解 第80课:I must go to the....
新概念英语第一册视频讲解 第63课:Thank you, doctor.谢谢你,医生
新概念英语第一册视频讲解 第62课:What’s the matter with them?
新概念英语第一册视频讲解 第101课:A card from Jimmy吉米的明信片
新概念英语第一册视频讲解 第55课:The Sawyer family索耶一家人
新概念英语第一册视频讲解 第59课:Is that all?就这些吗?
新概念英语第一册视频讲解 第93课:Our new neighbour 我们的新邻居
新概念英语第一册视频讲解 第103课:The French test法语考试
新概念英语第一册视频讲解 第79课:Carol’s shopping list卡罗尔的购物单
新概念英语第一册视频讲解 第86课:What have you done?
新概念英语第一册视频讲解 第58课:What’s the time?
新概念英语第一册视频讲解 第85课:Pairs in the spring巴黎之春
新概念英语第一册视频讲解 第98课:Whose is it?
新概念英语第一册视频讲解 第67课:The weekend周末
新概念英语第一册视频讲解 第72课:When did you...
新概念英语第一册视频讲解 第64课:Don’t...
新概念英语第一册视频讲解 第73课:The way to King Street到国王街的走法
新概念英语第一册视频讲解 第68课:What’s the time?
新概念英语第一册视频讲解 第65课:Not a baby不是一个孩子
新概念英语第一册视频讲解 第61课:A bad cold重感冒
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |