Gravity is the universal force of attraction between objects with mass.
الكلمة في 30 ثانية
- The force that attracts objects towards each other.
- Keeps us on the ground and planets in orbit.
- A fundamental force in physics and astronomy.
Overview
重力，也称为万有引力，是宇宙中最基本的四种基本相互作用之一。它是一种吸引力，存在于所有具有质量的物体之间。质量越大，重力就越强。距离越远，重力就越弱。地球的重力将我们固定在地面上，并使物体从高处落下。月球的重力导致潮汐。太阳的重力使地球和其他行星围绕其运行。
在日常生活中，我们很少直接使用“重力”这个词，但它是一个重要的物理概念。它经常出现在科学、物理学和天文学的语境中。在讨论物体下落、重量、太空探索或宇宙结构时，会用到这个词。例如，宇航员在太空中会经历失重状态，因为那里没有像地球那样强的重力。
科学课本、物理学讲座、天文学讨论、工程设计（例如桥梁、建筑物）、体育运动（例如跳高、跳远）、讨论重量和质量。
与“重力”最接近的词是“引力”。在物理学中，这两个词通常可以互换使用，都指物体间的吸引力。有时，“万有引力”被用来强调其普遍性，即宇宙中所有物体都相互吸引。在日常语境中，“重力”更常用，尤其指地球对物体的吸引力。
أمثلة
苹果从树上掉下来是因为地球的重力。
everydayThe apple fell from the tree because of Earth's gravity.
在太空中，宇航员会体验到微重力状态。
formalIn space, astronauts experience microgravity.
没有重力的话，我们都会飘起来。
informalWithout gravity, we would all float away.
万有引力定律描述了两个质点之间的吸引力。
academicThe law of universal gravitation describes the attractive force between two point masses.
تلازمات شائعة
العبارات الشائعة
抵抗重力
resist gravity
重力场
gravitational field
失去重力
lose gravity
يُخلط عادةً مع
Mass is the amount of matter in an object, while gravity is the force of attraction caused by that mass. An object has mass regardless of gravity, but its weight (the force of gravity acting on it) depends on the gravitational field.
Buoyancy is an upward force exerted by a fluid that opposes the weight of an immersed object. Gravity is the downward force pulling objects towards the Earth's center.
أنماط نحوية
How to Use It
ملاحظات الاستخدام
Gravity is primarily used in scientific and academic contexts. While the concept is understood by most people, the word itself is less common in casual everyday conversation compared to its effects (like 'falling' or 'weight'). When discussing physics or astronomy, 'gravity' is the standard term.
أخطاء شائعة
Learners sometimes confuse 'gravity' (the force) with 'mass' (the amount of matter) or 'weight' (the measure of the gravitational force on an object). It's important to distinguish between the force itself and its effects or related properties.
Tips
Think of Gravity as Pull
Imagine gravity as an invisible rope pulling objects together. The bigger the objects, the stronger the pull.
Gravity vs. Mass
Remember that gravity is a force, while mass is the amount of matter in an object. Mass causes gravity.
Gravity in Mythology
Many ancient cultures explained falling objects through myths involving gods or spirits pulling things down, predating the scientific understanding of gravity.
أصل الكلمة
The word 'gravity' comes from the Latin word 'gravitas', meaning 'weight' or 'heaviness'. This reflects its function in making objects have weight.
السياق الثقافي
The understanding of gravity has evolved significantly, from ancient philosophical ideas to Newton's law and Einstein's theory of relativity. It's a foundational concept in our scientific worldview.
نصيحة للحفظ
Think of 'gravity' sounding like 'grave' or 'serious', emphasizing the powerful, inescapable pull that keeps everything grounded.
الأسئلة الشائعة
4 أسئلة重量是物体受到的重力的大小。重力是使物体有重量的原因。在地球上，重量随重力而变化，但在太空中，物体可能没有重量，但仍然有质量。
月球也有质量，所以它会产生重力。但是，由于月球的质量比地球小得多，所以它的重力也比地球小，大约是地球重力的六分之一。
重力是形成恒星、行星、星系等宇宙结构的关键力量。它使天体保持在轨道上，并控制着宇宙的演化。
我们感受到重力是因为它把我们拉向地球。这使我们能够站立、行走，并且当我们跳起来时，我们最终会落回地面。它也是我们感觉到的“重量”的来源。
اختبر نفسك
地球的______把我们牢牢地固定在地面上。
地球的重力是吸引物体向其中心的力，这使我们能够站立和行走。
以下哪项不是由重力引起的？
气球升空是因为它内部的气体比空气轻，受到浮力作用而上升，与重力（向下的拉力）相反。
构建一个关于重力影响的句子。
这个句子正确地描述了重力在天体运动中的作用。
النتيجة: /3
Summary
Gravity is the universal force of attraction between objects with mass.
- The force that attracts objects towards each other.
- Keeps us on the ground and planets in orbit.
- A fundamental force in physics and astronomy.
Think of Gravity as Pull
Imagine gravity as an invisible rope pulling objects together. The bigger the objects, the stronger the pull.
Gravity vs. Mass
Remember that gravity is a force, while mass is the amount of matter in an object. Mass causes gravity.
Gravity in Mythology
Many ancient cultures explained falling objects through myths involving gods or spirits pulling things down, predating the scientific understanding of gravity.
أمثلة
4 من 4苹果从树上掉下来是因为地球的重力。
The apple fell from the tree because of Earth's gravity.
在太空中，宇航员会体验到微重力状态。
In space, astronauts experience microgravity.
没有重力的话，我们都会飘起来。
Without gravity, we would all float away.
万有引力定律描述了两个质点之间的吸引力。
The law of universal gravitation describes the attractive force between two point masses.
Related Content
هذه الكلمة بلغات أخرى
مفردات ذات صلة
مزيد من كلمات science
吸收
A1To absorb; to take in.
海拔
B1The height of an object or place above sea level.
属性
B1A quality or feature that is typical of or belongs to something or someone.
生物
B1Any living thing, or the study of living organisms. Basic term for IELTS biology-related reading passages.
模糊
A1Blurry; vague; indistinct.
呼吸
A1To breathe; respiration.
燃烧
A1To burn; combustion.
计算
A1To calculate; to compute; to determine a value mathematically.
推算
B1To calculate, estimate, or figure out something using data, logic, or mathematical methods. It implies a process of reasoning from known facts to unknown values.
校准
B1To calibrate, adjust, or check for accuracy against a standard. It is used for instruments, data, or plans.
