2014.07.26【英译中】一维运动

碎了翅膀 (donna) 路人甲
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发表于:2014-08-03 19:55 [只看楼主] [划词开启]

Motion in One Dimension

一维运动

High-speed passenger trains such as the one shown here are used in many countries, including Japan, France, England,Germany, and South Korea. These trains have operational speeds from 200 to 300 km/h.A train moving along a straight track is an example of one-dimensional motion. The train in the diagram is covering greater distances in equal time intervals—in other words, it is accelerating.

在包括日本、法国、英国、德国和南韩的很多国家都有如图所示的高速客运。这些火车的运行速度从200千米每小时到300千米每小时。一辆沿着直线运动的或者就是一个一维运动例子。图解中的这辆货车在相同的运行时间里走过了更多的距离,换句话说,它正在加速。

WHAT TO EXPECT

预览

In this chapter, you will learn how to analyze one-dimensional motion in terms of displacement,time, speed, and velocity. You will also learn how to distinguish between accelerated and nonaccelerated motion.

在这一章里,我们将学习如何用位移、时间、速率和速度这些术语分析一维运动。你还将学到如何区分加速运动和非加速运动。

Why it Matters

为什么他很重要

Velocity and acceleration are involved in many aspects of everyday life, from riding a bicycle to driving a car to traveling on a high-speed train.The definitions and equations you will study in this chapter allow you to make predictions about these aspects of motion, given certain initial conditions.

日常生活中的很多方面都涉及速度和加速度,从骑自行到开汽车再到乘高速火车旅行。这一章我们要学习到的定义和方程可以让你在给定的初始条件下预测它们的运动。

CHAPTER PREVIEW

本章预览

1 Displacement and Velocity

Motion

Displacement

Velocity

1 位移和速度

运动

位移

速度

2 Acceleration

Changes in Velocity

Motion with Constant Acceleration

2 加速度

速度的变化

匀加速运动

3 Falling Objects

Free Fall

3 下落的物体

自由下落

分类: 英语
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