Work Example
功的例子
In order for a force to do work on an object there must be motion which has a component in the direction of the force.
Data may be entered for any of the quantities below. When data entry is finished, click on the text in the illustration above for the quantity you wish to calculate. The data in the three fields will not be forced to be consistent until you click on the quantity to be calculated.
For the special case of a constant force, the work may be calculated by multiplying the distance times the component of force which acts in the direction of motion. For arbitrary force and distance vectors in space, this can be expressed as a scalar product of vectors.
对于恒力的情况，功可以通过将距离乘以作用在运动方向上的力的分量来计算。对于空间中任意的力和位移矢量，这可以表示为两个矢量的标量积。
可用于以下任何量的数据输入。当数据输入完成时，点击示意图中您希望计算的量的文本。在点击计算的量之前，三个字段中的数据不会被强制保持一致。功 = N × cos 度 × m = 焦耳 功 = lb × cos 度 × ft = 英尺磅
中文译文中的待填/计算数值依次对应：1：f 2：a 3：d 4：w 5：fc 6：ac 7：dc 8：wc。实际数值以上方原输入框为准。
为了使力对物体做功，物体必须有在力的方向上的运动分量。
Work concepts
功的概念
| HyperPhysics***** Mechanics
力学 | R Nave |
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