kinetic friction

简明释义

动摩擦

英英释义

例句

1.Reducing kinetic friction 动摩擦力 in machinery can lead to increased efficiency and less wear.

减少机械中的kinetic friction 动摩擦力可以提高效率并减少磨损。

2.The kinetic friction 动摩擦力 is usually less than static friction when an object starts moving.

当物体开始移动时，kinetic friction 动摩擦力通常小于静摩擦力。

3.During the physics experiment, we measured the kinetic friction 动摩擦力 between different surfaces.

在物理实验中，我们测量了不同表面之间的kinetic friction 动摩擦力。

4.The kinetic friction 动摩擦力 acting on a sliding box can be calculated using the coefficient of friction and the normal force.

滑动箱子上的kinetic friction 动摩擦力可以通过摩擦系数和法向力来计算。

5.When a car skids on the road, it is primarily due to the kinetic friction 动摩擦力 between the tires and the pavement.

当一辆车在路上打滑时，主要是由于轮胎与路面之间的kinetic friction 动摩擦力。

作文

Kinetic friction is a fundamental concept in physics that describes the force opposing the motion of two surfaces sliding against each other. This force plays a crucial role in everyday activities, from walking to driving a car. Understanding kinetic friction (动摩擦力) helps us grasp how objects interact and move in our environment. When we walk, for instance, our shoes push against the ground. The force exerted by the ground on our shoes is what allows us to move forward. This interaction is governed by kinetic friction (动摩擦力), which prevents us from slipping. If there were no kinetic friction (动摩擦力), we would find it challenging to maintain our balance and control our movements. The amount of kinetic friction (动摩擦力) present between two surfaces depends on several factors, including the nature of the materials involved and the normal force pressing them together. For example, rubber on asphalt has a high coefficient of kinetic friction (动摩擦力), which is why cars can stop effectively when brakes are applied. Conversely, ice on metal has a low coefficient, making it very slippery. In engineering, understanding kinetic friction (动摩擦力) is vital for designing safe and efficient machinery. Engineers must account for kinetic friction (动摩擦力) when creating systems that involve moving parts. For instance, in a car engine, the pistons must slide smoothly within their cylinders. If the kinetic friction (动摩擦力) is too high, it could lead to excessive wear and tear, reducing the engine's lifespan. Moreover, kinetic friction (动摩擦力) is also essential in sports. Athletes rely on it to enhance their performance. For instance, a sprinter benefits from the kinetic friction (动摩擦力) between their shoes and the track, allowing for better acceleration and speed. Similarly, a soccer player uses kinetic friction (动摩擦力) to control the ball during play. However, kinetic friction (动摩擦力) is not always beneficial. In some cases, it can lead to energy loss in the form of heat. This is particularly evident in machines where moving parts experience high kinetic friction (动摩擦力). To combat this, lubricants are often used to reduce the effects of kinetic friction (动摩擦力), allowing for smoother operation and increased efficiency. In conclusion, kinetic friction (动摩擦力) is an essential aspect of physics that influences many aspects of our daily lives. From walking and sports to engineering and machinery, understanding kinetic friction (动摩擦力) enables us to improve our interactions with the physical world. By studying this force, we can develop better technologies and enhance our performance in various activities. Therefore, grasping the concept of kinetic friction (动摩擦力) is not just an academic exercise but a practical necessity in our modern world.

动摩擦力是物理学中的一个基本概念，描述了两种表面相互滑动时反对运动的力量。这种力量在日常活动中扮演着至关重要的角色，从走路到开车。理解动摩擦力（kinetic friction）有助于我们掌握物体如何在环境中相互作用和移动。例如，当我们走路时，我们的鞋子会推向地面。地面对鞋子施加的力量使我们能够向前移动。这种相互作用受动摩擦力（kinetic friction）的支配，防止我们滑倒。如果没有动摩擦力（kinetic friction），我们将很难保持平衡和控制动作。两个表面之间存在的动摩擦力（kinetic friction）量取决于几个因素，包括材料的性质和压在它们之间的法向力。例如，橡胶与沥青之间的摩擦系数较高，这就是为什么汽车在刹车时能够有效停下来。相反，冰面上的金属摩擦系数较低，使其非常滑。在工程学中，理解动摩擦力（kinetic friction）对于设计安全高效的机械至关重要。工程师必须考虑动摩擦力（kinetic friction），以创建涉及运动部件的系统。例如，在汽车发动机中，活塞必须在气缸内平稳滑动。如果动摩擦力（kinetic friction）过高，可能导致过度磨损，减少发动机的使用寿命。此外，动摩擦力（kinetic friction）在体育运动中也至关重要。运动员依赖于它来提高表现。例如，短跑运动员受益于他们的鞋子与跑道之间的动摩擦力（kinetic friction），从而实现更好的加速和速度。同样，足球运动员在比赛中使用动摩擦力（kinetic friction）来控制球。然而，动摩擦力（kinetic friction）并不总是有益的。在某些情况下，它可能导致能量以热量的形式损失。这在移动部件经历高动摩擦力（kinetic friction）的机器中特别明显。为了解决这个问题，通常使用润滑剂来减少动摩擦力（kinetic friction）的影响，从而实现更平滑的操作和提高效率。总之，动摩擦力（kinetic friction）是物理学中的一个重要方面，影响着我们日常生活的许多方面。从走路和运动到工程和机械，理解动摩擦力（kinetic friction）使我们能够改善与物理世界的互动。通过研究这种力量，我们可以开发更好的技术，并增强我们在各种活动中的表现。因此，掌握动摩擦力（kinetic friction）的概念不仅仅是学术练习，而是我们现代世界中的实际必要性。