free body

简明释义

隔离体

英英释义

例句

1.When analyzing the motion of a car, we often draw a free body diagram to visualize the forces acting on it.

在分析汽车运动时，我们通常会绘制一个自由体图来可视化作用于它的力。

2.In engineering, a free body analysis is essential for determining load distributions.

在工程中，自由体分析对于确定载荷分布至关重要。

3.To solve this problem, you need to identify all the forces acting on the free body.

要解决这个问题，你需要识别作用于自由体的所有力。

4.The concept of a free body helps students understand equilibrium in mechanics.

自由体的概念帮助学生理解力学中的平衡。

5.In physics, a free body is an object that is not influenced by any external forces.

在物理学中，自由体是一个不受任何外力影响的物体。

作文

In physics, the concept of a free body refers to an object that is not influenced by any external forces other than those acting on it. This idea is crucial in understanding the principles of mechanics, as it allows us to analyze the motion of objects in isolation from their surroundings. When we consider a free body, we simplify complex interactions and focus solely on the forces acting upon it. To illustrate this concept, let’s take the example of a car moving along a straight road. When analyzing the car as a free body, we can identify the forces acting on it, such as gravity, friction, and the engine's thrust. By isolating the car in this manner, we can apply Newton's laws of motion effectively. For instance, if we know the mass of the car and the net force acting on it, we can determine its acceleration using the formula F=ma, where F is the net force, m is the mass, and a is the acceleration. Understanding the notion of a free body is also essential when dealing with more complex systems, like a bridge or a building. Engineers often use free body diagrams to visualize the forces acting on different parts of a structure. These diagrams help them ensure that the design can withstand various loads, such as weight, wind, and seismic activity. By analyzing each component as a free body, engineers can predict how the structure will behave under different conditions. Moreover, the application of the free body concept extends beyond just static structures; it is vital in dynamic situations as well. For example, when a football is kicked, we can treat the ball as a free body after it leaves the player’s foot. The forces acting on the ball include gravity pulling it down and air resistance opposing its motion. By applying the principles of a free body analysis, we can predict the trajectory of the ball and understand how factors like angle and speed affect its flight path. In summary, the concept of a free body is fundamental in the study of physics and engineering. It allows us to break down complex problems into manageable parts, making it easier to analyze and understand the dynamics of motion and force. Whether we are studying simple objects like cars and balls or complex structures like bridges, the ability to isolate a free body and examine the forces at play is an invaluable tool. As we continue to explore the physical world, the understanding of free body concepts will remain a cornerstone of scientific inquiry, enabling us to solve problems and innovate in various fields.

在物理学中，自由体的概念指的是一个不受任何外部力影响的物体，除了作用于它的那些力。这个想法对于理解力学原理至关重要，因为它使我们能够在与周围环境隔离的情况下分析物体的运动。当我们考虑一个自由体时，我们简化复杂的相互作用，专注于作用于它的力。为了说明这一概念，让我们以一辆沿直路行驶的汽车为例。在将汽车视为自由体时，我们可以识别出作用于它的力，例如重力、摩擦力和发动机的推力。通过这种方式孤立汽车，我们可以有效地应用牛顿运动定律。例如，如果我们知道汽车的质量和作用在其上的净力，我们可以使用公式F=ma来确定其加速度，其中F是净力，m是质量，a是加速度。理解自由体的概念在处理更复杂的系统时也是必不可少的，比如桥梁或建筑物。工程师们经常使用自由体图来可视化结构不同部分所受的力。这些图帮助他们确保设计能够承受各种负载，例如重量、风和地震活动。通过将每个组件视为自由体，工程师可以预测结构在不同条件下的行为。此外，自由体概念的应用不仅限于静态结构；它在动态情况下同样至关重要。例如，当一只足球被踢出时，我们可以将球视为离开球员脚后作为一个自由体。作用于球的力包括重力将其向下拉和空气阻力抵抗其运动。通过应用自由体分析的原则，我们可以预测球的轨迹，并理解角度和速度等因素如何影响其飞行路径。总之，自由体的概念是物理学和工程学研究中的基础。它使我们能够将复杂问题分解为可管理的部分，从而更容易分析和理解运动和力的动态。无论我们是在研究简单物体如汽车和球，还是复杂结构如桥梁，孤立一个自由体并检查作用在其上的力的能力都是一种无价的工具。随着我们继续探索物理世界，对自由体概念的理解将始终是科学探究的基石，使我们能够解决问题并在各个领域进行创新。