gravitational force

简明释义

引力；重力

英英释义

例句

1.The gravitational force 引力 between the Earth and the Moon keeps the Moon in orbit.

地球和月球之间的gravitational force 引力使月球保持在轨道上。

2.Astronauts experience a reduction in gravitational force 引力 while in space.

宇航员在太空中经历了gravitational force 引力的降低。

3.The gravitational force 引力 of a black hole is so strong that nothing can escape it.

黑洞的gravitational force 引力如此强大，以至于没有任何东西可以逃脱。

4.Scientists study the gravitational force 引力 to understand the motion of planets.

科学家研究gravitational force 引力以理解行星的运动。

5.The gravitational force 引力 affects how objects fall to the ground.

由于gravitational force 引力，物体下落到地面的方式受到影响。

作文

The concept of gravitational force is fundamental to our understanding of the universe. It is the force that attracts two bodies towards each other, and it plays a crucial role in various phenomena we observe in our daily lives. From the falling of an apple from a tree to the orbits of planets around the sun, gravitational force governs the motion of objects in space and on Earth. To understand gravitational force, we first need to consider Isaac Newton's law of universal gravitation. Newton proposed that every point mass attracts every other point mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This means that the greater the mass of an object, the stronger its gravitational force will be. Similarly, as the distance between two objects increases, the strength of the gravitational force decreases. For example, the Earth, being a massive body, exerts a significant gravitational force on everything on its surface. This is why we experience weight; our bodies are being pulled towards the center of the Earth by this force. Without this gravitational force, we would not be able to stay grounded, and everything would float away into space. Moreover, gravitational force is not limited to just Earth. The moon, which orbits the Earth, is kept in its path due to the gravitational force exerted by our planet. This interaction creates tides in our oceans, demonstrating how gravitational force can influence water levels and marine life. Additionally, the gravitational force between the Earth and the moon is also responsible for the phenomenon of eclipses, where one celestial body moves into the shadow of another. In the context of astronomy, gravitational force is essential for the formation and stability of galaxies. Stars, gas, and dust are held together by their mutual gravitational force, allowing them to form clusters and eventually galaxies. The gravitational force also governs the motions of stars within galaxies, leading to complex dynamics that scientists study to understand the evolution of the cosmos. In modern physics, the concept of gravitational force has been expanded upon by Einstein's theory of general relativity. Einstein proposed that gravitational force is not merely a force but rather a curvature of spacetime caused by mass. According to this theory, massive objects like stars and planets warp the fabric of spacetime around them, causing smaller objects to move along curved paths. This revolutionary idea has provided deeper insights into the nature of gravity and has been confirmed through numerous experiments and observations. In conclusion, gravitational force is a fundamental aspect of the physical world that affects everything from the smallest particles to the largest galaxies. Understanding this force is crucial for comprehending the universe's structure and behavior. As we continue to explore and learn more about gravitational force, we uncover the intricate connections that bind the cosmos together, reminding us of the elegance and complexity of the natural world.

“引力”这一概念对我们理解宇宙至关重要。它是吸引两个物体彼此靠近的力量，并在我们日常生活中观察到的各种现象中发挥着关键作用。从苹果从树上掉落到行星围绕太阳的轨道，引力支配着空间和地球上物体的运动。要理解引力，我们首先需要考虑艾萨克·牛顿的万有引力定律。牛顿提出，宇宙中的每个点质量都会以与其质量积成正比、与它们中心之间距离的平方成反比的力量吸引其他每个点质量。这意味着物体的质量越大，其引力就会越强。同样，当两个物体之间的距离增加时，引力的强度就会减弱。例如，地球作为一个巨大天体，对其表面上的一切施加显著的引力。这就是我们体验到重量的原因；我们的身体被这种力量拉向地球的中心。如果没有这种引力，我们将无法保持在地面上，所有东西都会飘向太空。此外，引力并不仅限于地球。月球围绕地球运行，正是由于地球施加的引力使其保持在轨道上。这种相互作用在我们的海洋中造成潮汐，展示了引力如何影响水位和海洋生物。此外，地球和月球之间的引力也导致了日食和月食现象，其中一个天体进入另一个的阴影。在天文学的背景下，引力对于星系的形成和稳定至关重要。恒星、气体和尘埃通过相互的引力结合在一起，使它们能够形成星团，最终形成星系。引力还支配着恒星在星系内的运动，导致复杂的动态变化，科学家们研究这些变化以理解宇宙的演化。在现代物理学中，引力的概念已通过爱因斯坦的广义相对论得到了扩展。爱因斯坦提出，引力不仅仅是一种力量，而是由质量引起的时空曲率。根据这一理论，像恒星和行星这样的巨大物体扭曲它们周围时空的结构，导致较小的物体沿着弯曲的路径移动。这一革命性的思想为我们提供了对重力本质的更深刻见解，并通过许多实验和观察得到了证实。总之，引力是物理世界的一个基本方面，影响着从最小粒子到最大星系的一切。理解这一力量对理解宇宙的结构和行为至关重要。随着我们继续探索和学习更多关于引力的知识，我们揭示了将宇宙联系在一起的复杂联系，提醒我们自然世界的优雅与复杂。