请输入您要查询的字词:

 

单词 rotational motion
释义 rotational motion
The laws relating to the rotation of a body about an axis are analogous to those describing linear motion. The angular displacement (θ) of a body is the angle in radians through which a point or line has been rotated in a specified sense about a specified axis. The angular velocity (ω) is the rate of change of angular displacement with time, i.e.
ω = dθ/dt
, and the angular acceleration (α) is the rate of change of angular velocity, i.e.
α = dω/dt = d2θ/dt2
.
The equations of linear motion have analogous rotational equivalents, e.g.:
ω2 = ω1 + αt
θ = ω1t + αt2/2
ω22 = ω12 + 2θα

The counterpart of Newton's second law of motion is
T = Iα
, where T is the torque causing the angular acceleration and I is the moment of inertia of the rotating body
随便看

 

物理辞典收录了3346条物理词条,基本涵盖了常用物理知识及物理英语单词词组的翻译及用法,是物理学习的有利工具。

 

Copyright © 2000-2023 Newdu.com.com All Rights Reserved
更新时间:2025/6/22 22:27:20