我们相信,机械能守恒定理。
现在我想回到，机械能守恒。
Now I want to return to the conservation of mechanical energy.
我百分百相信，机械能守恒。
因此这是，机械能守恒。
我相信，机械能守恒定理，我忽略了张力。
I believed in the conservation of mechanical energy and I overlooked the tension.
我们也可以运用，机械能守恒，因为弹力，是恒力。
We were able to apply the conservation of mechanical energy because spring forces are conservative forces.
我们知道，机械能守恒定律-，动能和，势能的总和。
Then we have the conservation - of mechanical energy — the sum of kinetic energy and potential energy.
指出机械能守恒定律是服从相对性原理的。
It is pointed out that the relativity principle is satisfied by the law of conservation of mechanical energy.
肯定有什么，基础性的错误，这个机械能守恒定理。
There must be something fundamentally wrong with the conservation of mechanical energy.
记住这个，我们能够很放心地,使用机械能守恒定理。
So with this in mind, I feel comfortable to pursue my conservation of mechanical energy.
系统地阐明机械能守恒定律无条件服从力学相对性原理。
It is explained that the law of conservation of mechanical energy obeys relativity principle of mechanics.
研究具有双面理想完整约束的变质量力学系统的机械能守恒律。
The conservation law of mechanical energy in variable mass mechanical systems with ideal bilateral holonomic constraints is studied.
讨论了在非惯性参照系中如何应用功能原理和机械能守恒定律。
The paper discusses how to use the principle of conversion between work and potential energy and the law of conservation of mechanical energy in the frame of non-initial reference.
现在，我很相信，机械能守恒，我愿意把我的生命，放到这条线上。
Now, I am such a strong believer of the conservation of mechanical energy that I am willing to put my life on the line.
5倍于半径的高度，机械能守恒定理，告诉我们照着书，要经过这点的最小值。
5 times the radius, conservation of mechanical energy tells you that that is the minimum it takes to just go through that point.
好的我开始了，点A距离这个平面,高度差，现在运用,机械能守恒定理。
Okay, I start off, point A is at a distance h h above this level, and so I apply now the conservation of mechanical energy.
我坚信，机械能守恒定理，会起作用，我几乎杀了自己-，近乎杀了自己-，那个球大概15公斤？
I was so convinced that the conservation of mechanical energy was going to work - that I almost killed myself — - not quite — with this huge, 15?
从一道力学试题出发，讨论了机械能守恒的条件，并深入研究了守恒规律的协变性要求。
Some mistaken viewpoints were clarified, and requirements on covariability of conservation law were studied deeply.
本文就静摩擦力做功以及在静摩擦力做功过程中机械能守恒问题，结合实例做进一步讨论。
A discussion is made of the work done by static frictional force and the conservation of mechanical energy in the work doing process by way of typical cases.
分析了机械能守恒的内涵及条件，对有的教材关于机械能守恒定律的表述提出了不同的见解。
This article analyses the meaning and prerequisite of conservation of mechanical energy, and poses different standpoints on describing the law of conservation of mechanical energy in some textbooks.
本文讨论了惯性参照系与非惯性参照系，分析了在不同的惯性参照系中做功和机械能守恒问题。
In this paper, inertia reference frame and un-inertia reference frame were studied and questions about mechanical work and conservation of energy in different inertia reference frame were discussed.
在应用机械能守恒定律时，如何巧选弹簧弹性势能零点问题进行了探讨，并结合实例进行了分析。
This paper deals with the problem of how to skilfully select spring elastic potential energy zero in applying law of conservation of mechanical energy, and makes some analyses combined with examples.
大声点。，lewin：，So, speak, up。，我们可以尝试用，机械能守恒定律吗？，这样用有什么问题吗？
LEWIN Shall we try the conservation of mechanical energy Is there anything wrong with that?
文章系统地阐明了机械能守恒定律无条件服从力学相对性原理，若总机械能在一个惯性系守恒，它就在所有惯性系守恒。
In this paper it is explained that the law of conservation of mechanical energy must Obey the relativity principle of mechanics.
从时间的均匀性可推得机械能守恒定律，从空间的均匀性和空间的各向同性可分别推出动量守恒定律和角动量守恒定律。
To use respectively that rigid body plane differential equations of motion, theorem of angular momentum, conservation law of mechanical energy, and the law of conservation of energy.
本文针对系统相对于地球参照系机械能守恒时，在相对于地面作匀速直线运动的参照系中机械能是否依然守恒的问题进行了重新论证。
This article expounds again whether the mechanical energy is in the uniform motion in a straight line, as the mechanical energy is conservative when the system is in the frame of earth reference.
本文深入分析了机械能守恒定律的物理内涵，利用具体事例讨论并纠正了对该定律的两种常见错误认识，并指出了教学中应注意的问题。
This paper deeply analyzes the physical connotation of the Law of Conservation of Mechanical Energy, and points out the attention-worthy matters in the teaching process.
本文深入分析了机械能守恒定律的物理内涵，利用具体事例讨论并纠正了对该定律的两种常见错误认识，并指出了教学中应注意的问题。
This paper deeply analyzes the physical connotation of the Law of Conservation of Mechanical Energy, and points out the attention-worthy matters in the teaching process.
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