dynamic friction; kinetic friction

简明释义

动摩擦

英英释义

例句

1.To calculate the force required to slide a crate, you must consider the kinetic friction 动摩擦 coefficient.

为了计算滑动一个箱子所需的力，你必须考虑动摩擦 动摩擦系数。

2.The dynamic friction 动摩擦 between the sled and the snow affects how fast it can slide down the hill.

雪橇与雪之间的动态摩擦 动摩擦影响它滑下山坡的速度。

3.The kinetic friction 动摩擦 is generally less than static friction, which is why it's easier to keep an object moving than to start its motion.

由于动摩擦 动摩擦通常小于静摩擦，所以保持物体运动比开始运动更容易。

4.When pushing a heavy box across the floor, you need to overcome the dynamic friction 动摩擦 between the box and the surface.

当你把一个重箱子推过地板时，你需要克服箱子与表面之间的动态摩擦 动摩擦。

5.In a car, the tires experience dynamic friction 动摩擦 with the road surface while driving.

在汽车中，轮胎在行驶时与路面之间会产生动态摩擦 动摩擦。

作文

Friction is a fundamental force that plays a crucial role in our daily lives and various physical processes. In the realm of physics, friction can be categorized into different types, primarily static friction and dynamic friction. Among these, dynamic friction (动态摩擦) and kinetic friction (动摩擦) are often used interchangeably, yet they have distinct meanings and implications in the study of motion. Understanding these concepts is essential for anyone interested in mechanics, engineering, or even everyday applications.To begin with, it is important to define what dynamic friction refers to. This type of friction occurs when two surfaces slide against each other. It is the force that opposes the motion of an object in motion relative to another surface. For instance, when a box is pushed across the floor, the resistance felt is due to dynamic friction. The amount of dynamic friction depends on several factors, including the nature of the surfaces in contact and the normal force pressing them together.On the other hand, kinetic friction is a term that is often used to describe the same phenomenon as dynamic friction. However, in some contexts, kinetic friction specifically refers to the frictional force acting on an object that is already in motion. This means that when an object slides over a surface, the friction opposing its motion can be termed as kinetic friction. The key point here is that while all kinetic friction is dynamic friction, not all dynamic friction is necessarily kinetic friction if we consider the broader category of motion.The distinction between these two terms is particularly important in engineering and physics. For example, when designing vehicles, engineers must calculate the dynamic friction between tires and the road to ensure safety and performance. If the dynamic friction is too low, the vehicle may skid, leading to dangerous situations. Similarly, in manufacturing processes where materials slide over one another, understanding kinetic friction is crucial for optimizing efficiency and reducing wear on machinery.Moreover, the coefficients of dynamic friction and kinetic friction vary depending on the materials involved. For instance, rubber on concrete has a high coefficient of friction, which translates to greater grip and stability. Conversely, ice on metal has a low coefficient, resulting in slippery conditions. These variations are essential considerations in both practical applications and theoretical studies.In conclusion, grasping the concepts of dynamic friction and kinetic friction is vital for understanding how objects interact with their environments. While both terms refer to frictional forces that oppose motion, recognizing their nuances can enhance our comprehension of physical principles. Whether in the context of everyday activities or advanced engineering projects, the implications of these forces are profound and far-reaching. As we continue to explore the laws of physics, the role of friction remains a pivotal area of study, influencing everything from transportation to manufacturing processes. By mastering the distinctions and applications of dynamic friction and kinetic friction, we can better appreciate the complexities of motion and force in the world around us.

摩擦是一个基本的力，在我们的日常生活和各种物理过程中起着至关重要的作用。在物理学领域，摩擦可以分为不同类型，主要是静摩擦和动态摩擦。在这些类型中，dynamic friction（动态摩擦）和kinetic friction（动摩擦）通常可以互换使用，然而它们在运动研究中有着不同的含义和影响。理解这些概念对于任何对力学、工程学或甚至日常应用感兴趣的人来说都是必不可少的。首先，重要的是定义什么是dynamic friction。这种类型的摩擦发生在两个表面相互滑动时。它是抵抗相对另一个表面上运动物体运动的力量。例如，当一个箱子被推过地板时，所感受到的阻力就是由于dynamic friction造成的。dynamic friction的大小取决于多个因素，包括接触表面的性质和压在它们之间的法向力。另一方面，kinetic friction是一个常常用来描述与dynamic friction相同现象的术语。然而，在某些上下文中，kinetic friction特指作用于已经在运动中的物体的摩擦力。这意味着当一个物体在表面上滑动时，抵抗其运动的摩擦可以称为kinetic friction。这里的关键点是，虽然所有的kinetic friction都是dynamic friction，但如果我们考虑运动的更广泛类别，并不是所有的dynamic friction都一定是kinetic friction。这两个术语之间的区别在工程和物理学中尤为重要。例如，在设计车辆时，工程师必须计算轮胎与道路之间的dynamic friction以确保安全和性能。如果dynamic friction太低，车辆可能会打滑，导致危险情况。同样，在材料相互滑动的制造过程中，理解kinetic friction对于优化效率和减少机械磨损至关重要。此外，dynamic friction和kinetic friction的系数因所涉及的材料而异。例如，橡胶在混凝土上的摩擦系数很高，这意味着更大的抓地力和稳定性。相反，冰在金属上具有较低的系数，导致滑溜的条件。这些变化在实际应用和理论研究中都是重要的考虑因素。总之，掌握dynamic friction和kinetic friction的概念对于理解物体如何与其环境相互作用至关重要。虽然这两个术语都指抵抗运动的摩擦力，但认识到它们的细微差别可以增强我们对物理原理的理解。无论是在日常活动还是高级工程项目中，这些力量的影响都是深远的。随着我们继续探索物理定律，摩擦的角色仍然是一个关键的研究领域，影响着从交通运输到制造过程的方方面面。通过掌握dynamic friction和kinetic friction的区别和应用，我们可以更好地欣赏周围世界中运动和力的复杂性。