重力
- When I'm here, gravitational potential energy; increases in this way; the gravitational force is in this direction.
重力势能，这样增长，重力；，是在这个方向，当我在这里。 - The static equilibrium and the vibrations of the spring-particle system under the action of the gravitational force
关于质点弹簧系统在重力作用下的静平衡与振动 - We are reluctantly accepted the gravitational force between matter and matter, even a look.
我们都在无奈中接受物与物之间的万有引力，甚至是一个目光。 - So a lot of people objected to Newton's postulation of this gravitational force.
所以很多人拒绝接受牛顿关于万有引力的假设。 - But for all practical purposes the gravitational force between a person and the earth can be described in terms of just a few numbers, such as the person's total mass.
但是就现实用途而言，我们可以仅仅使用几个数字描述人和地球之间的重力，例如人的总体质量。 - Newton's law of gravity; Gravitational force from a shell; Hooke's'law '.
克普勒圆周轨道第三定律；利用积分推导球壳的引力；弹簧。 - The force, gravitational force, falls off as one over r squared.
，力，重力，随着r的平方而减少。 - In his monumental work begun in 1666, Newton discovered three vital facts about the gravitational force.
牛顿在他开始于一六六六年的不朽的工作中，发现了有关万有引力的三个极其重要的事实。 - The gravitational force is in the direction potential energy.
的方向，和势能增加的方向，注意，当我在这里。 - Newton's problem was to express in mathematical terms the gravitational force between different bodies.
牛顿的目标是要用数学形式来表示不同物体之间的引力。 - If they are three units apart the gravitational force between is one ninth.
如果有三个单位的距离，那么引力就是九分之一。 - Each mass is subject to two forces, namely the tension of the string and the gravitational force.
每一个物体受到两个力，即细绳的张力和重力作用。 - So if we apply that concept, then we first have to know what is the gravitational force.
如果我们运用这概念，我们必须先知道，引力是什么。 - So let's now turn to Newton's universal law of gravity, and believe it or not, I think I even give you on the exam the gravitational force of Newton's universal law of gravity.
下面是牛顿的万有，引力定律，不管你信，或不信，在考试中，我出了关于万有引力，定律的题目。 - There is a gravitational force.
有一个重力作用。 - And it's important conceptually because a lot of the forces are gradients of potentials, namely, gravitational force, electric force.
这在概念上很重要，因为很多力都是势场的梯度，比如重力场，电场。 - In addition, the bridges act as large diagonal trusses, which transfer gravitational force to the ground.
此外，桥梁也作为一个大的交叉桁架，将受力传送到地面。 - There is a gravitational force on the bottle.
壶上有重力。 - If I look at this result the sum of gravitational potential energy and kinetic energy is conserved-for gravitational force then it is immediately obvious where we put the zero of kinetic energy.
如果看这个结果-，重力势能与动能之和，在重力作用下，是守恒的-，马上，很明显的发现，动能为0的地方。 - Mg There's a gravitational force, which is mg, but there is also tension.
存在重力也就是，但是还存在张力。 - The paper expounds the principle and the method of measuring zenith distance for celestial positioning based on the direction of gravitational force line.
论述了在海上进行天文定位时以重力线作基准直接测定天体顶距的原理和方法。 - The work of the gravitational force, therefore, depends only on the initial and final elevations and not on the path.
所以，重力的功仅取决于初高度和末高度，而与路径无关。 - This leakage has a profound effect on the gravitational force between objects separated by more than the critical distance.
这种能量的渗漏，对于超过某一临界距离的物体间的重力而言，有著深远的影响。 - And now we're going to multiply that by the gravitational force constant.
我们现在把这个结果，和重力常量相乘。 - And there has to be here a force on the system, the gravitational force, which is the same as the centripetal force.
这个系统中，存在重力，和向心力相等。 - This strong connection is like a gravitational force on a higher dimension.
这种强烈的关系，就好像更高维次里的万有引力。 - This is the formula for a thick vertically faulted slab with such a large throw that the downthrow side makes no contribution to the gravitational force.
这是有垂直断层的厚板体的公式，其断层的落差是这样大，以致下落翼对重力场没有什么影响。 - Suppose there were no gravitational force, objects would not fall to the floor.
假如没有引力，物体就不会落到地面上。 - So it's only mg that matters& the gravitational force.
所以只有重力-，起作用。 - And, what you gain by that is that by symmetry, the gravitational force will be directed along the z axis.
这是由对称性得出来的，重力方向会沿着z轴。