reaction force

简明释义

反酌力

英英释义

例句

1.When you push against a wall, the wall exerts a reaction force (反作用力) back on you.

当你推墙时，墙会对你施加一个反作用力。

2.When a swimmer pushes the water backwards, the water pushes them forward through the reaction force (反作用力).

当游泳者向后推水时，水通过反作用力将他们向前推。

3.In gymnastics, when a gymnast lands on the mat, the mat provides a reaction force (反作用力) to support their weight.

在体操中，当运动员落在垫子上时，垫子提供一个反作用力来支撑他们的重量。

4.In a rocket launch, the engines produce thrust, and the reaction force (反作用力) propels the rocket upward.

在火箭发射中，发动机产生推力，而反作用力使火箭向上推进。

5.A horse pulls a cart, and the cart exerts a reaction force (反作用力) that pulls back on the horse.

马拉着一辆车，而这辆车施加一个反作用力，向后拉着马。

作文

In the realm of physics, the concept of force is fundamental to understanding how objects interact with one another. One particular type of force that plays a crucial role in these interactions is known as reaction force. The term reaction force refers to the force that is exerted by a surface or object in response to an applied force. This principle is encapsulated in Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. This means that whenever an object exerts a force on another object, the second object exerts a force of equal magnitude but in the opposite direction back on the first object. To illustrate this concept, let’s consider a simple example: when a person jumps off a diving board. As the individual pushes down on the board with their legs, they apply a downward force onto the board. According to Newton's Third Law, the diving board simultaneously exerts an equal and opposite reaction force upwards against the person. This upward reaction force propels the person into the air, allowing them to perform various acrobatic maneuvers before entering the water. Without this reaction force, it would be impossible for the individual to achieve the height necessary for a successful dive.Another common scenario where reaction force is evident is in walking. When a person walks, their foot pushes backward against the ground. In response, the ground exerts a forward reaction force that propels the person forward. This interaction between the foot and the ground is essential for movement, demonstrating how reaction forces are integral to our everyday activities.The importance of reaction forces extends beyond simple activities like jumping or walking; it is also critical in various engineering applications. For instance, when designing vehicles, engineers must consider the reaction forces that will occur during acceleration, braking, and cornering. Understanding these forces helps in creating safer and more efficient designs. For example, when a car accelerates, the tires push against the road surface, creating a downward force. In turn, the road provides an upward reaction force that allows the vehicle to move forward. If the reaction force is insufficient, the tires may lose traction, leading to skidding or loss of control.Moreover, the concept of reaction forces is not limited to physical objects; it can also be observed in social interactions. For every action taken by an individual, there is often a corresponding reaction force in the form of social feedback. For example, if a student contributes positively to a group project, the reaction force from their peers may be encouragement and support. Conversely, negative actions may elicit criticism or withdrawal from others. This analogy highlights the broader implications of reaction forces in both physical and social realms.In conclusion, the concept of reaction force is a vital aspect of understanding motion and interaction in both physics and daily life. From the simple act of jumping off a diving board to the complex dynamics of vehicle design and social interactions, reaction forces are everywhere. By grasping this fundamental principle, we can better appreciate the intricacies of how forces work in tandem to shape our experiences and the world around us.

在物理学领域，力的概念对理解物体之间的相互作用至关重要。一个在这些相互作用中发挥关键作用的力的类型被称为反作用力。术语反作用力指的是表面或物体对施加的力所施加的力。这个原理被牛顿的第三运动定律所概括，该定律指出，对于每一个作用，都有一个大小相等但方向相反的反作用。这意味着，每当一个物体对另一个物体施加力时，第二个物体会以相等的大小但相反的方向反作用于第一个物体。为了说明这一概念，让我们考虑一个简单的例子：当一个人从跳板上跳下时。个人用腿向下推跳板时，他们对跳板施加了一个向下的力。根据牛顿的第三定律，跳板同时施加一个向上的相等的反作用力，推动这个人向空中跃起，使他们能够在入水之前进行各种杂技动作。如果没有这个反作用力，这个人将无法达到成功跳水所需的高度。另一个常见的场景是走路时，反作用力的存在。当一个人走路时，他们的脚向后推地面。作为回应，地面施加一个向前的反作用力，推动这个人向前移动。这种脚与地面之间的相互作用对于运动至关重要，表明反作用力在我们日常活动中是不可或缺的。反作用力的重要性不仅限于简单的活动，如跳跃或走路；它在各种工程应用中也至关重要。例如，在设计车辆时，工程师必须考虑在加速、制动和转弯过程中发生的反作用力。理解这些力有助于创造更安全、更高效的设计。例如，当一辆车加速时，轮胎向地面施加向下的力。作为回应，地面提供一个向上的反作用力，使车辆向前移动。如果反作用力不足，轮胎可能会失去抓地力，导致滑行或失控。此外，反作用力的概念并不限于物理对象；它也可以在社会互动中观察到。每个人采取的每一个行动，往往会在社会反馈中产生相应的反作用力。例如，如果一个学生在小组项目中积极贡献，来自同伴的反作用力可能是鼓励和支持。相反，消极行为可能引发批评或他人的撤回。这一类比突显了反作用力在物理和社会领域的更广泛影响。总之，反作用力的概念是理解物理和日常生活中运动与相互作用的重要方面。从简单的跳板跳跃到车辆设计的复杂动态以及社会互动，反作用力无处不在。通过掌握这一基本原理，我们可以更好地欣赏力量如何协同作用来塑造我们的体验和周围的世界。