两个英文物理题1.An elevator under repair is descending at constant speed.At the moment it passes the mechanic,he drops his wrench.The wrench hits the elevator after 1,4second.What is the speed of the elevator?What is the speed of the wrench at

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两个英文物理题1.Anelevatorunderrepairisdescendingatconstantspeed.Atthemomentitpassesthemechanic,hedropshisw

两个英文物理题1.An elevator under repair is descending at constant speed.At the moment it passes the mechanic,he drops his wrench.The wrench hits the elevator after 1,4second.What is the speed of the elevator?What is the speed of the wrench at
第一道题不是很明白是什么情景
觉得缺条件
第二道问的是自由下落的物体在前半路程和后半路程所用的时间比是多少
画图比较直观
答案应该是1/(√2 - 1)

两个英文物理题1.An elevator under repair is descending at constant speed.At the moment it passes the mechanic,he drops his wrench.The wrench hits the elevator after 1,4second.What is the speed of the elevator?What is the speed of the wrench at 1.An elevator under repair is descending at constant speed.At the moment it passes the mechanic,he drops his wrench.The wrench hits the elevator after 1,4second.What is the speed of the elevator?What is the speed of the wrench at the moment of hittin 英语翻译请问英文高手people stuck in elevator是什么意识英文中“再电梯里”用什么＋elevator? 英语翻译1、 A young man gets on an elevator.The elevator goes up.The elevator stops.A young woman gets on the elevator.The elevator goes up.Then it stops.It doesn't go up.It doesn't go down.It is stuck between floors.The elevator ia stuck for 19 英语翻译A young man gets on an elevator.The elevator goes up.The elevator stops.A young woman gets on the elevator.The elevator goes up.Then it stops.It doesn'tgo up.It doesnn'tgo down.It is stuck between floors.The elevator is stuck for 19 hours Does this store have an elevator?an escalator是要回答问题不是翻译 two people alone in an elevator写一小段对话用two people alone in an elevator写一小段对话， a young man gets on an elevator.完形填空 a young man gets on an elevator.The elevator goes（）.The elevatorstops.A young women （）on the elevator.The elevator goes up.Then it（）.It doesn't go up.It doesn't go（）.It is stuck（）floors elevator是什么意思 elevator是什么意思? 一道英文(sat2)物理题 When you come out of the elevator, turn ______ left.A. a B. an C. the D. / A woman is waiting for( )elevator with a baby A.an B.the .为什么选B不选A? 英文物理题,英文高手们,帮帮忙吧~~可否翻译出原体,在给出英文答案?谢谢了!1.What is a proton,neutron, and electron?2.What is an element, mixture, molecule, and compound?3.What will determine if an object will float if is pla 英语翻译A bolt comes loose from underneath an elevator that is moving upward at a speed of 4.2 m/s.The bolt reaches the bottom of the elevator shaft in 3.7 s. TANK ELEVATOR什么意思? elevator怎么读