kinetic friction

简明释义

动摩擦

英英释义

例句

1.Engineers must calculate the kinetic friction 动摩擦力 when designing machinery to ensure efficient operation.

工程师在设计机械时必须计算动摩擦力以确保高效运行。

2.When a car is sliding on the road, the force that slows it down is due to kinetic friction 动摩擦力 between the tires and the pavement.

当一辆车在路面上滑行时，减缓它速度的力量是由于轮胎与路面之间的动摩擦力。

3.The kinetic friction 动摩擦力 between a sled and snow can affect how fast it moves downhill.

雪橇与雪之间的动摩擦力会影响它下坡时的速度。

4.In sports like ice skating, the kinetic friction 动摩擦力 is minimal, allowing skaters to glide smoothly.

在像滑冰这样的运动中，动摩擦力非常小，使得滑冰者能够平滑地滑行。

5.The kinetic friction 动摩擦力 between the block and the surface determines how quickly it comes to a stop.

块体与表面之间的动摩擦力决定了它停下来的速度。

作文

Kinetic friction, or 动摩擦, is a fundamental concept in physics that describes the force opposing the motion of two surfaces sliding against each other. This type of friction occurs when an object is already in motion, and it plays a crucial role in various real-world applications. Understanding 动摩擦 is essential not only in physics but also in engineering, sports, and everyday life. To illustrate the importance of 动摩擦, consider the example of a car driving on a road. When the tires roll over the asphalt, they experience 动摩擦 with the surface. This frictional force enables the car to accelerate, decelerate, and make turns. Without sufficient 动摩擦, the tires would slip, leading to loss of control and potentially dangerous situations. Thus, the design of tires takes into account the coefficient of 动摩擦 to ensure safety and performance. In contrast to static friction, which prevents an object from starting to move, 动摩擦 acts on objects that are already sliding. The coefficient of 动摩擦 is typically lower than that of static friction, meaning that it usually requires less force to keep an object moving than to start its motion. This can be demonstrated through a simple experiment: if you push a heavy box on a smooth surface, it takes a significant amount of force to get it moving, but once it starts sliding, it becomes easier to push due to the effects of 动摩擦. Another important aspect of 动摩擦 is its dependence on the materials involved and their surface conditions. For instance, rubber on concrete has a high coefficient of 动摩擦, which is why vehicles can effectively stop when brakes are applied. Conversely, ice on metal has a very low coefficient of 动摩擦, leading to slippery conditions that can cause accidents. This variability is crucial in designing surfaces for specific applications, such as sports tracks, roads, and even machinery. In sports, understanding 动摩擦 can enhance performance. Athletes often train on surfaces that optimize their grip and minimize slipping. For example, track athletes benefit from running shoes designed to maximize 动摩擦 with the ground, allowing them to sprint efficiently without losing traction. Similarly, in sports like skiing, the interaction between skis and snow involves careful consideration of 动摩擦 to achieve the right balance between speed and control. Moreover, 动摩擦 is also a critical factor in the design of mechanical systems. Engineers must account for 动摩擦 when creating machines to ensure they operate smoothly and efficiently. Excessive friction can lead to wear and tear, reducing the lifespan of components and increasing maintenance costs. Therefore, lubricants are often used to reduce 动摩擦 in machinery, allowing parts to move more freely and enhancing overall performance. In conclusion, 动摩擦 is a key concept that influences many aspects of our lives, from the cars we drive to the sports we play. By understanding how 动摩擦 works and its implications, we can make better choices in design, safety, and performance. Whether in physics, engineering, or daily activities, recognizing the role of 动摩擦 allows us to appreciate the complex interactions that govern motion and stability in our world.

动摩擦是物理学中的一个基本概念，描述了两个表面相互滑动时反对运动的力。这种摩擦力发生在物体已经在运动时，在各种现实世界的应用中起着至关重要的作用。理解动摩擦不仅在物理学中至关重要，而且在工程、体育和日常生活中也同样重要。为了说明动摩擦的重要性，可以考虑汽车在道路上行驶的例子。当轮胎在沥青上滚动时，它们与表面之间会产生动摩擦。这种摩擦力使汽车能够加速、减速和转弯。如果没有足够的动摩擦，轮胎就会打滑，导致失去控制和潜在的危险情况。因此，轮胎的设计考虑了动摩擦系数，以确保安全和性能。与静摩擦不同，静摩擦防止物体开始移动，而动摩擦作用于已经滑动的物体。动摩擦系数通常低于静摩擦系数，这意味着保持物体运动所需的力通常小于启动其运动所需的力。这可以通过一个简单的实验来演示：如果你在光滑的表面上推一个重箱子，起初需要相当大的力才能使其移动，但一旦它开始滑动，由于动摩擦的影响，推动它变得更容易。动摩擦的另一个重要方面是它依赖于所涉及材料及其表面条件。例如，橡胶与混凝土之间的动摩擦系数很高，这就是为什么车辆在刹车时能够有效停止的原因。相反，冰与金属之间的动摩擦系数非常低，导致滑溜的条件可能引发事故。这种变异性在为特定应用设计表面时至关重要，例如运动跑道、道路甚至机械。在体育运动中，理解动摩擦可以提升表现。运动员通常在优化抓地力和最小化滑动的表面上训练。例如，田径运动员受益于设计用于最大化与地面动摩擦的跑鞋，使他们能够高效地冲刺而不失去抓地力。类似地，在滑雪等运动中，滑雪板与雪之间的相互作用涉及仔细考虑动摩擦，以实现速度与控制之间的正确平衡。此外，动摩擦在机械系统的设计中也是一个关键因素。工程师在创建机器时必须考虑动摩擦，以确保它们平稳高效地运行。过度的摩擦可能导致磨损，缩短部件的使用寿命并增加维护成本。因此，润滑剂通常用于减少机械中的动摩擦，使部件能够更自由地移动，从而提高整体性能。总之，动摩擦是影响我们生活许多方面的关键概念，从我们驾驶的汽车到我们参与的运动。通过理解动摩擦的工作原理及其影响，我们可以在设计、安全和性能方面做出更好的选择。无论是在物理学、工程学还是日常活动中，认识到动摩擦的作用使我们能够欣赏支配我们世界中运动和稳定性的复杂相互作用。