gravitational field

简明释义

万有引力场

英英释义

例句

1.To calculate the force acting on an object, you need to know the gravitational field strength at that location.

要计算作用在物体上的力，您需要知道该位置的引力场强度。

2.The strength of the gravitational field around Earth is approximately 9.81 m/s².

地球周围的引力场强度约为9.81米每秒平方。

3.The gravitational field of the Moon is weaker than that of Earth, which is why astronauts can jump higher there.

月球的引力场比地球弱，这就是为什么宇航员在那里能跳得更高。

4.Astronauts experience weightlessness because they are in a free-fall within a gravitational field.

宇航员体验到失重，因为他们在一个引力场中自由下落。

5.The gravitational field of a planet affects the trajectory of spacecraft traveling through space.

行星的引力场影响穿越太空的航天器轨迹。

作文

The concept of a gravitational field is fundamental in understanding the forces that govern our universe. A gravitational field is essentially a region of space surrounding a mass where another mass experiences a force of attraction. This phenomenon is a result of the mass of an object and the distance between the objects involved. For instance, the Earth creates a gravitational field that pulls objects towards its center, which is why when we drop something, it falls to the ground. To delve deeper into this concept, we can consider Isaac Newton's law of universal gravitation, which states that every mass attracts every other mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This law implies that the strength of a gravitational field diminishes with distance. As one moves further away from a massive body, the force experienced due to the gravitational field weakens. Moreover, the concept of a gravitational field is not limited to just the Earth; it extends to all celestial bodies. For example, the Sun has a significant gravitational field that keeps the planets, including Earth, in orbit around it. The balance between the gravitational field of the Sun and the inertia of the planets moving in space results in stable orbits. Without this gravitational field, the planets would drift off into space. In the context of modern physics, Albert Einstein introduced the idea of gravity as a curvature of spacetime rather than just a force acting at a distance. In his General Theory of Relativity, a gravitational field can be thought of as the geometric property of spacetime that dictates how objects move within it. This perspective provides a more comprehensive understanding of how gravity operates, especially in extreme conditions such as near black holes, where the gravitational field is incredibly strong. Understanding gravitational fields also has practical implications in various fields such as astrophysics, engineering, and even everyday life. For instance, satellite technology relies on precise calculations of gravitational fields to maintain their orbits around the Earth. Engineers designing structures must account for the gravitational field when determining load-bearing capacities. Furthermore, our understanding of gravitational fields aids in navigation systems, allowing us to accurately position ourselves on the globe. In conclusion, the gravitational field is a pivotal concept that underpins much of what we understand about the universe. From the falling of an apple to the ground to the orbits of planets around the Sun, the gravitational field plays a crucial role in shaping the behavior of objects in space. As we continue to explore the mysteries of our universe, the study of gravitational fields will undoubtedly remain a key area of interest for scientists and researchers alike.

引力场的概念在理解支配我们宇宙的力量时是基础性的。引力场本质上是一个围绕着质量的空间区域，在这个区域内，另一种质量会经历一种吸引力。这一现象是由物体的质量和所涉及物体之间的距离所导致的。例如，地球产生一个引力场，将物体拉向其中心，这就是为什么当我们掉落某物时，它会掉到地面上。更深入探讨这个概念，我们可以考虑艾萨克·牛顿的万有引力定律，该定律指出，每个质量都以与其质量的乘积成正比、与它们之间距离的平方成反比的力量吸引其他每个质量。该定律意味着引力场的强度随着距离的增加而减弱。当一个物体远离一个大质量体时，由于引力场产生的力量会减弱。此外，引力场的概念并不仅限于地球；它扩展到所有天体。例如，太阳有一个显著的引力场，使行星，包括地球，围绕它旋转。太阳的引力场与行星在空间中运动的惯性之间的平衡导致稳定的轨道。如果没有这个引力场，行星将漂流到太空中。在现代物理学的背景下，阿尔伯特·爱因斯坦提出了重力是时空曲率的观点，而不仅仅是作用于距离的力量。在他的广义相对论中，引力场可以被视为时空的几何属性，决定了物体在其中如何运动。这一观点提供了对重力运作的更全面理解，尤其是在极端条件下，例如在黑洞附近，引力场非常强。理解引力场也在各个领域如天体物理学、工程学甚至日常生活中具有实际意义。例如，卫星技术依赖于对引力场的精确计算，以维持它们在地球周围的轨道。设计结构的工程师必须考虑引力场，以确定承载能力。此外，我们对引力场的理解有助于导航系统，使我们能够准确地定位在地球上的位置。总之，引力场是一个关键概念，支撑着我们对宇宙的许多理解。从苹果落地到行星围绕太阳的轨道，引力场在塑造空间中物体行为方面发挥着至关重要的作用。随着我们继续探索宇宙的奥秘，引力场的研究无疑将始终是科学家和研究人员关注的重点领域。