average velocity

简明释义

平均速度;

英英释义

例句

1.If a cyclist covers 40 miles in 2 hours, their average velocity 平均速度 is 20 miles per hour.

如果一个骑自行车的人在2小时内骑行了40英里，他们的平均速度是每小时20英里。

2.During the race, the runner's average velocity 平均速度 was calculated to be 10 meters per second.

在比赛期间，跑步者的平均速度被计算为每秒10米。

3.The car traveled 150 kilometers in 2 hours, so its average velocity 平均速度 is 75 km/h.

这辆车在2小时内行驶了150公里，所以它的平均速度是75公里每小时。

4.To find the average velocity 平均速度, divide the total distance by the total time taken.

要找出平均速度，将总距离除以总时间。

5.The average velocity 平均速度 of an object can change if it accelerates or decelerates.

如果物体加速或减速，平均速度可能会改变。

作文

Understanding the concept of average velocity is crucial in both physics and everyday life. In simple terms, average velocity refers to the total displacement divided by the total time taken for that displacement. This means that when we talk about average velocity, we are not just concerned with how fast an object is moving, but rather how far it has moved from its initial position over a specified period. For instance, if a car travels 100 kilometers north in two hours, its average velocity would be 50 kilometers per hour north. This concept can be easily illustrated through various real-life examples. Imagine a runner participating in a marathon. If the runner starts at the starting line and finishes at the finish line, the average velocity can be calculated based on the distance covered and the time taken to complete the race. If the marathon distance is 42 kilometers and the runner finishes in 4 hours, the average velocity would be 10.5 kilometers per hour. This gives us a clear idea of the runner's performance throughout the race.It is important to distinguish average velocity from average speed, as they are often confused. While average velocity considers displacement, which is the shortest distance between the starting and ending points, average speed takes into account the total distance traveled without regard to direction. For example, if the same runner zigzags along the course, covering a total distance of 45 kilometers but still finishing at the same point, their average velocity remains the same, but their average speed would be different. Understanding this distinction is vital for accurate calculations in physics and engineering.In addition to its practical applications, the concept of average velocity also plays a significant role in scientific research and experimentation. Researchers often need to measure the average velocity of particles in various experiments to understand their behavior under different conditions. For instance, in fluid dynamics, the average velocity of a fluid flowing through a pipe is crucial for determining the efficiency of the system and predicting how it will behave under various pressures and temperatures.Moreover, average velocity can also be applied in fields such as economics and social sciences. For example, one might analyze the average velocity of economic growth in a country over a decade by examining the total change in GDP divided by the number of years. This analysis provides insights into the stability and performance of the economy over time.In conclusion, understanding average velocity enhances our comprehension of motion in both theoretical and practical contexts. It allows us to quantify how quickly an object changes its position and provides essential information for various scientific, engineering, and economic analyses. By grasping this concept, we gain a deeper appreciation for the dynamics of movement and the factors influencing it. Whether we are calculating the speed of a vehicle or analyzing data in a research study, the notion of average velocity remains a fundamental aspect of our understanding of the world around us.

理解平均速度的概念在物理学和日常生活中都是至关重要的。简单来说，平均速度是指总位移除以所用的总时间。这意味着当我们谈论平均速度时，我们不仅关心物体移动的速度，还关心它在特定时间内从初始位置移动的距离。例如，如果一辆车在两个小时内向北行驶100公里，那么它的平均速度将是每小时50公里向北。这个概念可以通过各种现实生活中的例子轻松说明。想象一下一个参加马拉松的跑者。如果跑者从起点出发并在终点完成比赛，则可以根据所覆盖的距离和完成比赛所需的时间来计算平均速度。如果马拉松的距离是42公里，而跑者在4小时内完成，那么平均速度将是每小时10.5公里。这让我们清楚地了解跑者在整个比赛中的表现。区分平均速度和平均速率也很重要，因为它们常常被混淆。虽然平均速度考虑的是位移，即起点和终点之间的最短距离，但平均速率则考虑的是总行驶距离而不涉及方向。例如，如果同样的跑者在赛道上曲折行驶，覆盖了总共45公里但仍然到达同一点，他们的平均速度保持不变，但他们的平均速率会有所不同。理解这种区别对于物理和工程中的准确计算至关重要。除了实际应用外，平均速度的概念在科学研究和实验中也发挥着重要作用。研究人员在各种实验中常常需要测量粒子的平均速度以理解它们在不同条件下的行为。例如，在流体动力学中，流经管道的流体的平均速度对于确定系统的效率以及预测其在不同压力和温度下的行为至关重要。此外，平均速度还可以应用于经济学和社会科学等领域。例如，人们可以通过检查国内生产总值的总变化除以年份的数量来分析一个国家在十年内的经济增长平均速度。这种分析为我们提供了对经济在一段时间内稳定性和表现的洞察。总之，理解平均速度增强了我们对理论和实际背景中运动的理解。它使我们能够量化物体改变位置的速度，并为各种科学、工程和经济分析提供了必要的信息。通过掌握这一概念，我们对运动的动态及其影响因素有了更深刻的认识。无论我们是在计算车辆的速度，还是在分析研究数据，平均速度的概念始终是我们理解周围世界的基本方面。