centre of mass

简明释义

惯性中心

英英释义

例句

1.When calculating the centre of mass 质心, consider the distribution of mass in the object.

在计算质心时，要考虑物体内质量的分布。

2.To balance the seesaw, you need to position yourself at the centre of mass 质心 of the board.

为了平衡跷跷板，你需要站在板子的质心上。

3.In physics, the centre of mass 质心 is crucial for analyzing motion.

在物理学中，质心对于分析运动至关重要。

4.The centre of mass 质心 of a uniform rod is located at its midpoint.

一根均匀杆的质心位于其中点。

5.The centre of mass 质心 of a planet affects its gravitational field.

一个行星的质心影响着它的引力场。

作文

The concept of the centre of mass is fundamental in physics and engineering. It refers to the point at which the mass of a body or a system is concentrated and can be considered as the average position of all the mass in that object. Understanding the centre of mass is crucial for analyzing the motion of objects, especially when they are subjected to external forces. For instance, when a person jumps, their body rotates around their centre of mass, allowing them to perform various tricks in the air. This principle can also be observed in sports, such as gymnastics or diving, where athletes manipulate their bodies to achieve optimal performance based on their centre of mass.In practical applications, engineers often need to calculate the centre of mass of structures to ensure stability and balance. For example, in designing vehicles, the centre of mass plays a vital role in determining how the vehicle handles during turns and maneuvers. A low centre of mass generally leads to better stability, while a high centre of mass can increase the risk of tipping over. This is why race cars are designed with a low centre of mass to enhance their performance on the track.Moreover, the centre of mass is not limited to solid objects. It can also apply to systems of particles and even celestial bodies. In astrophysics, understanding the centre of mass of a star system helps scientists predict the orbits of planets and other celestial bodies. For instance, the centre of mass of the Earth-Moon system is located inside the Earth, which is why the Moon appears to orbit around our planet.To further illustrate the importance of the centre of mass, consider the example of balancing a seesaw. The centre of mass of the seesaw must align with the fulcrum for it to remain balanced. If one side is heavier, the centre of mass shifts, causing the seesaw to tilt. This simple demonstration shows how the centre of mass affects equilibrium and stability in everyday scenarios.In conclusion, the centre of mass is a pivotal concept that influences various fields, from sports to engineering and astrophysics. By understanding how to locate and manipulate the centre of mass, we can enhance performance, ensure safety, and gain deeper insights into the mechanics of motion. Whether it’s in designing a stable structure or executing a perfect flip in the air, the centre of mass remains a key factor in achieving success in both theoretical and practical applications.

质心的概念在物理和工程中是基本的。它指的是一个物体或系统的质量集中点，可以被视为该物体所有质量的平均位置。理解质心对于分析物体的运动至关重要，尤其是在它们受到外力作用时。例如，当一个人跳跃时，他们的身体围绕其质心旋转，从而使他们能够在空中执行各种技巧。这一原理也可以在体育运动中观察到，例如体操或跳水，运动员根据他们的质心操控身体以达到最佳表现。在实际应用中，工程师通常需要计算结构的质心，以确保稳定性和平衡性。例如，在设计车辆时，质心在确定车辆在转弯和操控时的表现中起着至关重要的作用。较低的质心通常会导致更好的稳定性，而较高的质心则可能增加翻倒的风险。这就是为什么赛车设计成低质心，以增强它们在赛道上的表现。此外，质心不仅限于固体物体。它也适用于粒子系统甚至天体。在天体物理学中，理解一个星系的质心有助于科学家预测行星和其他天体的轨道。例如，地月系统的质心位于地球内部，这就是为什么月球似乎围绕我们的星球运行。为了进一步说明质心的重要性，考虑平衡跷跷板的例子。跷跷板的质心必须与支点对齐，才能保持平衡。如果一侧更重，质心就会移动，导致跷跷板倾斜。这个简单的演示展示了质心如何影响日常场景中的平衡和稳定性。总之，质心是一个关键概念，影响着从体育到工程和天体物理学等各个领域。通过理解如何定位和操控质心，我们可以提高表现，确保安全，并深入了解运动的力学。无论是在设计稳定结构还是在空中完成完美翻转，质心始终是实现理论和实践应用成功的关键因素。