terminal speed

简明释义

终速度

英英释义

例句

1.As an object falls through the atmosphere, it accelerates until it reaches terminal speed (终端速度).

当物体穿过大气层下落时，它会加速，直到达到terminal speed（终端速度）。

2.In free fall, a parachutist will experience a rapid increase in speed until they hit terminal speed (终端速度).

在自由落体中，跳伞者会迅速增加速度，直到达到terminal speed（终端速度）。

3.The terminal speed (终端速度) of a falling object depends on its mass and shape.

下落物体的terminal speed（终端速度）取决于其质量和形状。

4.When a skydiver jumps from an airplane, they eventually reach their terminal speed (终端速度), where the force of gravity is balanced by air resistance.

当跳伞者从飞机上跳下时，他们最终会达到他们的terminal speed（终端速度），在这个速度下，重力与空气阻力相平衡。

5.Understanding terminal speed (终端速度) is crucial for designing safe parachutes.

理解terminal speed（终端速度）对于设计安全的降落伞至关重要。

作文

In the realm of physics, understanding the concept of terminal speed is crucial for comprehending how objects behave when they fall through a fluid, such as air or water. Terminal speed refers to the constant speed that an object eventually reaches when the force of gravity pulling it downward is balanced by the drag force acting against it. This balance occurs after the object has fallen for a sufficient amount of time, allowing it to accelerate until it can no longer gain speed. To illustrate this concept, consider a skydiver jumping out of an airplane. Initially, the skydiver accelerates rapidly towards the ground due to the gravitational pull. However, as the skydiver falls, air resistance begins to act on them, increasing with their velocity. Eventually, the upward drag force equals the downward gravitational force, and the skydiver stops accelerating. At this point, they have reached their terminal speed. This speed is not only dependent on the mass of the skydiver but also on their position and surface area. For instance, if the skydiver spreads their arms and legs out, they will create more air resistance and thus have a lower terminal speed compared to when they dive headfirst.The concept of terminal speed is not limited to skydiving. It applies to various scenarios, including raindrops falling from the sky, a parachutist descending, or even a feather drifting downwards. Each of these objects will reach their own unique terminal speed based on their shape, size, and the fluid they are moving through. Understanding terminal speed has practical applications in engineering and design. For example, when designing vehicles or aircraft, engineers must consider the terminal speed of the vehicle to ensure stability and safety during operation. If a vehicle exceeds its terminal speed, it may experience structural failure or loss of control due to excessive forces acting upon it. Moreover, the study of terminal speed is essential in sports science, particularly in activities involving free fall, such as base jumping or paragliding. Athletes need to be aware of their terminal speed to make informed decisions about their safety equipment and techniques. In conclusion, terminal speed is a fundamental concept in physics that describes the constant speed achieved by an object when the forces acting upon it are balanced. Whether in the context of a skydiver, a raindrop, or an engineered vehicle, understanding terminal speed is vital for predicting behavior in fluid dynamics. This knowledge not only enhances our comprehension of natural phenomena but also informs practical applications across various fields, emphasizing the importance of physics in our everyday lives.

在物理学领域，理解“终端速度”这一概念对于理解物体在流体（如空气或水）中下落时的行为至关重要。“终端速度”是指一个物体最终达到的恒定速度，此时向下的重力与反向作用的阻力相平衡。当物体下落一段时间后，它会加速，直到无法再增加速度，这种平衡就会发生。为了说明这一概念，可以考虑一名跳伞者从飞机上跳下来的情景。最初，跳伞者由于重力的吸引迅速向地面加速。然而，随着跳伞者的下落，空气阻力开始对其产生作用，并随着速度的增加而增加。最终，向上的阻力等于向下的重力，此时跳伞者停止加速。在这一点上，他们达到了自己的终端速度。这个速度不仅取决于跳伞者的质量，还与他们的姿势和表面积有关。例如，如果跳伞者张开手臂和腿，他们会产生更多的空气阻力，因此相比于俯冲下落时，他们的终端速度会更低。“终端速度”这一概念并不限于跳伞。它适用于各种场景，包括从天空降落的雨滴、下降的降落伞或甚至漂浮下落的羽毛。这些物体每个都会根据其形状、大小和所移动的流体达到各自独特的终端速度。理解终端速度在工程和设计中具有实际应用。例如，在设计车辆或飞机时，工程师必须考虑该车辆的终端速度以确保在操作过程中的稳定性和安全性。如果车辆超过其终端速度，可能会因过大的作用力而导致结构失效或失控。此外，研究终端速度在体育科学中也至关重要，特别是在涉及自由落体的活动中，如极限跳伞或滑翔伞。运动员需要了解自己的终端速度以便做出关于安全设备和技术的明智决定。总之，“终端速度”是物理学中的一个基本概念，描述了物体在作用力平衡时所达到的恒定速度。无论是在跳伞者、雨滴还是工程车辆的背景下，理解终端速度对于预测流体动力学中的行为至关重要。这一知识不仅增强了我们对自然现象的理解，还为各个领域的实际应用提供了信息，强调了物理学在我们日常生活中的重要性。