V2EX applied force

Applied Force

定义 Definition

applied force外加力 / 施加的力。指由外部物体或人对某个系统(物体)主动施加的力,用来改变物体的运动状态或形状(常与摩擦力、重力等“自然存在的力”相对比)。在力学中常与net force(合力)一起讨论。

发音 Pronunciation

/plad frs/

例句 Examples

She increased the applied force to move the box.
她加大了外加力来推动箱子。

When the applied force exceeds friction, the object starts to slide, and its acceleration depends on the net force.
当外加力超过摩擦力时,物体开始滑动,而它的加速度取决于合力。

词源 Etymology

applied 来自动词 apply,源于拉丁语 applicāre(意为“贴近、连接、施加”);force 经由古法语 force 进入英语,与拉丁语 fortis(“强壮的”)相关。合在一起,applied force 字面即“被施加的力”,强调力的来源是外部主动作用。

相关词 Related Words

文学与著作 Literary Works

  • The Feynman Lectures on Physics(费曼《物理学讲义》)
  • University Physics(Young & Freedman《大学物理》)
  • Engineering Mechanics: Dynamics(Hibbeler《工程力学:动力学》)
  • Newton’s Principia(牛顿《自然哲学的数学原理》;在相关力学论述与后世教材表述中常以“施加的力/外力”概念出现)
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