reactive force

简明释义

反作用力

英英释义

例句

1.In a game of billiards, when the cue ball hits another ball, the collision produces a reactive force (反作用力) that transfers energy.

在台球游戏中，当母球撞击另一球时，碰撞产生的reactive force (反作用力) 转移了能量。

2.When you jump off a diving board, you push down on the board and feel a reactive force (反作用力) pushing you up into the air.

当你从跳板上跳下时，你向下推跳板，感受到一个把你向上推入空气的reactive force (反作用力)。

3.In swimming, when a swimmer pushes against the water, the reactive force (反作用力) of the water propels them forward.

在游泳中，当游泳者向水中用力时，水的reactive force (反作用力) 推动他们向前。

4.When a rocket launches, the engines produce thrust that creates a reactive force (反作用力) pushing it upwards.

当火箭发射时，发动机产生的推力产生了一个向上的reactive force (反作用力)。

5.A car accelerates forward because the tires push back against the road, creating a reactive force (反作用力) that moves the car.

汽车向前加速是因为轮胎向后推地面，产生了一个使汽车移动的reactive force (反作用力)。

作文

In the study of physics, one of the fundamental concepts that often arises is that of a reactive force. This term refers to the force that acts in opposition to another force, essentially serving as a response to an applied force. To better understand this concept, we can look at several real-world examples and delve deeper into the mechanics behind it.Consider the example of a person jumping off a diving board. When the diver pushes down on the board, they apply a force to it. According to Newton's Third Law of Motion, for every action, there is an equal and opposite reaction. Therefore, the board exerts a reactive force back against the diver's feet. This reactive force propels the diver upward into the air, demonstrating how forces interact in a dynamic environment.Another classic illustration of reactive force can be found in the realm of rockets. When a rocket engine ignites, it expels gas out of its thrusters at high speed. The action of the gases being expelled downward generates a reactive force that pushes the rocket upward. This principle is crucial for space travel, as it allows rockets to overcome the gravitational pull of the Earth and reach outer space. Without the concept of reactive force, our understanding of propulsion would be fundamentally different.Additionally, the concept of reactive force is not limited to just physical movements; it can also be observed in various engineering applications. For instance, in the design of bridges, engineers must account for the reactive forces that occur when vehicles travel across them. When a car drives onto a bridge, the weight of the car applies a downward force on the structure. In response, the bridge generates reactive forces that support the weight and keep the structure stable. This interplay of forces is essential for ensuring the safety and integrity of the bridge.Furthermore, reactive forces are also evident in everyday activities. When you sit in a chair, your body exerts a downward force due to gravity. Simultaneously, the chair exerts an equal and opposite reactive force upward, allowing you to remain seated without falling. This balance of forces is a constant in our daily lives, illustrating the importance of understanding reactive forces in both theoretical and practical contexts.In conclusion, the concept of reactive force is integral to our understanding of the physical world. It encompasses a wide range of phenomena, from simple actions like jumping off a diving board to complex systems like rocket propulsion and structural engineering. By grasping the principles behind reactive forces, we can better appreciate the interactions that govern motion and stability in our environment. As we continue to explore the laws of physics, the role of reactive force will undoubtedly remain a cornerstone of scientific inquiry and application.

在物理学研究中，一个经常出现的基本概念是反作用力。这个术语指的是与另一个力相对立的力，实质上是对施加力的响应。为了更好地理解这一概念，我们可以看几个现实世界的例子，并深入探讨其背后的机制。考虑一个人从跳板上跳下的例子。当跳水者向下推跳板时，他们对跳板施加了一个力。根据牛顿第三运动定律，对于每一个动作，总有一个相等且相反的反应。因此，跳板对跳水者的脚施加了一个反作用力。这个反作用力将跳水者向上推动入空气，展示了力量在动态环境中的相互作用。另一个经典的反作用力说明可以在火箭领域找到。当火箭发动机点火时，它以高速排出气体。排出气体向下的动作产生了一个反作用力，将火箭推向上方。这一原理对于太空旅行至关重要，因为它使火箭能够克服地球的引力，抵达外太空。如果没有反作用力的概念，我们对推进的理解将会完全不同。此外，反作用力的概念不仅限于物理运动；它还可以在各种工程应用中观察到。例如，在桥梁设计中，工程师必须考虑当车辆通过桥梁时发生的反作用力。当一辆车驶上桥梁时，车的重量对结构施加了一个向下的力。作为回应，桥梁产生了支持重量的反作用力，保持结构稳定。这种力量的相互作用对于确保桥梁的安全和完整性至关重要。此外，反作用力在日常活动中也显而易见。当你坐在椅子上时，你的身体由于重力施加了一个向下的力。同时，椅子向上施加一个相等且相反的反作用力，使你能够保持坐姿而不掉落。这种力量的平衡在我们的日常生活中是常态，说明了理解反作用力在理论和实践中的重要性。总之，反作用力的概念是我们理解物理世界的基石。它涵盖了从简单的动作（如从跳板跳下）到复杂系统（如火箭推进和结构工程）的广泛现象。通过掌握反作用力背后的原理，我们可以更好地欣赏支配我们环境中运动和稳定性的相互作用。在我们继续探索物理法则的过程中，反作用力的角色无疑将始终是科学探究和应用的基石。