gravitational force

简明释义

重力；引力

英英释义

例句

1.Astronauts experience a sensation of weightlessness because the gravitational force is much weaker in space.

宇航员感受到失重的感觉，因为在太空中引力要弱得多。

2.The gravitational force of the moon affects the tides on Earth.

月球的引力影响着地球上的潮汐。

3.Scientists study the gravitational force to understand the motion of planets.

科学家研究引力以理解行星的运动。

4.The gravitational force is what keeps us anchored to the Earth.

这引力是让我们固定在地球上的原因。

5.The gravitational force between two objects increases as their masses increase.

两个物体之间的引力随着它们的质量增加而增加。

作文

The universe is governed by a variety of forces, and among these, the most fundamental is the gravitational force. This force is responsible for the attraction between two masses, pulling them together with a strength that depends on their masses and the distance between them. The concept of gravitational force is not only crucial in physics but also plays a significant role in our daily lives. Without it, our planet would not be able to hold onto its atmosphere, and life as we know it would be impossible.To understand the gravitational force, we can look at the famous law of universal gravitation formulated by Sir Isaac Newton in the 17th century. Newton proposed that every mass attracts every other mass in the universe with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This means that if you double the mass of one object, the gravitational attraction doubles, and if you double the distance, the force is reduced to a quarter. This relationship is expressed mathematically as F = G(m1*m2)/r², where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.The implications of the gravitational force extend far beyond simple calculations. For instance, it governs the motion of planets around the sun, the orbits of moons around planets, and even the behavior of galaxies. The gravitational force is what keeps the Earth in orbit around the Sun, allowing for the changing seasons and the cycle of day and night. It is also responsible for the tides we experience on Earth, as the moon's gravitational force pulls on the Earth's oceans, creating high and low tides.Moreover, the gravitational force has been a subject of extensive study in modern physics, particularly in the context of Einstein's theory of general relativity. Einstein proposed that gravity is not just a force but a curvature of space-time caused by mass. According to this theory, massive objects like planets and stars warp the fabric of space-time around them, causing other objects to move along curved paths. This revolutionary idea changed our understanding of gravity and opened new avenues for research in astrophysics and cosmology.In our everyday lives, we encounter the effects of the gravitational force constantly. From the moment we wake up and feel the weight of our bodies pressing down on the ground, to the way objects fall when dropped, gravity is an ever-present force. Engineers must account for the gravitational force when designing buildings, bridges, and vehicles to ensure safety and stability. In sports, athletes utilize their understanding of gravity to enhance their performance, whether they are jumping, throwing, or running.In conclusion, the gravitational force is a fundamental aspect of the universe that influences everything from the motion of celestial bodies to our daily experiences. Understanding this force allows us to comprehend the intricate workings of the cosmos and the principles that govern our existence. As we continue to explore the mysteries of gravity, we gain deeper insights into the nature of reality itself and our place within it.

宇宙受到各种力的支配，其中最基本的是引力。这种力量负责两个质量之间的吸引力，依赖于它们的质量和它们之间的距离。引力的概念不仅在物理学中至关重要，还在我们的日常生活中发挥着重要作用。如果没有它，我们的星球将无法保持其大气层，生命也将变得不可能。为了理解引力，我们可以看看17世纪艾萨克·牛顿提出的万有引力定律。牛顿提出，每个质量都以一种与其质量的乘积成正比，与它们中心之间的距离的平方成反比的力量吸引宇宙中的每个其他质量。这意味着如果你将一个物体的质量加倍，重力吸引力就会加倍；如果你将距离加倍，力量则减少到四分之一。这个关系用数学公式表示为F = G(m1*m2)/r²，其中F是引力，G是引力常数，m1和m2是物体的质量，r是它们中心之间的距离。引力的影响远不止简单的计算。例如，它控制着行星绕太阳的运动、月球绕行星的轨道，甚至是星系的行为。引力使地球绕太阳运行，从而导致季节的变化和昼夜的循环。它还负责我们在地球上经历的潮汐，因为月球的引力拉动地球的海洋，形成高潮和低潮。此外，引力在现代物理学中也是广泛研究的主题，特别是在爱因斯坦的广义相对论的背景下。爱因斯坦提出，重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，像行星和恒星这样的巨大物体会扭曲它们周围的时空结构，导致其他物体沿着弯曲的路径移动。这一革命性的想法改变了我们对重力的理解，并开启了天体物理学和宇宙学研究的新途径。在我们的日常生活中，我们不断遇到引力的影响。从我们醒来时感受到身体压在地面上的重量，到物体掉落时的表现，重力是一个始终存在的力量。工程师在设计建筑、桥梁和车辆时必须考虑引力，以确保安全和稳定。在体育运动中，运动员利用他们对重力的理解来增强他们的表现，无论是跳跃、投掷还是奔跑。总之，引力是宇宙的一个基本方面，影响着从天体运动到我们日常体验的一切。理解这种力量使我们能够理解宇宙的复杂运作及其支配我们存在的原则。随着我们继续探索重力的奥秘，我们对现实本质及我们在其中的地位有了更深入的理解。