momentary velocity

简明释义

瞬时速度

英英释义

例句

1.During the roller coaster ride, riders experienced changes in momentary velocity at each drop.

在过山车的过程中，乘客在每个下降时经历了瞬时速度的变化。

2.Using radar, the police officer recorded the momentary velocity of the speeding vehicle.

警察使用雷达记录了超速车辆的瞬时速度。

3.The car's momentary velocity was measured at 60 mph as it approached the intersection.

当汽车驶近交叉口时，其瞬时速度被测量为每小时60英里。

4.In sports science, understanding an athlete's momentary velocity can help improve performance.

在运动科学中，理解运动员的瞬时速度可以帮助提高表现。

5.The physicist explained how to calculate the momentary velocity of a falling object.

物理学家解释了如何计算下落物体的瞬时速度。

作文

In the study of physics, particularly in the field of mechanics, the concept of momentary velocity is crucial for understanding the motion of objects. Momentary velocity, defined as the velocity of an object at a specific instant in time, provides insight into how fast an object is moving and in what direction at that precise moment. This is distinct from average velocity, which considers the total displacement over a period of time. The significance of momentary velocity lies in its ability to describe instantaneous changes in motion, which is essential for analyzing dynamic systems.To illustrate this concept, consider a car traveling along a straight road. As the driver accelerates and decelerates, the speed of the car is not constant. At any given second, the car has a specific speed and direction, which can be described as its momentary velocity. For instance, if the car speeds up to 60 kilometers per hour while approaching a traffic light, the momentary velocity at that instant would be 60 km/h. However, if the driver suddenly applies the brakes, the momentary velocity will change rapidly, reflecting the new speed of the car as it slows down.Understanding momentary velocity is particularly important in various real-world applications. In sports, for example, coaches and athletes analyze the momentary velocity of players to improve performance. A sprinter's ability to reach maximum speed during a race can be assessed by examining their momentary velocity at different points along the track. Similarly, in the field of robotics, engineers must calculate the momentary velocity of robotic arms to ensure precision in manufacturing processes.Moreover, the concept of momentary velocity is integral to the understanding of calculus, where it relates to the derivative of the position function with respect to time. The derivative allows us to determine the momentary velocity of an object by calculating the slope of the tangent line to the position-time graph at a specific point. This mathematical approach not only provides a deeper understanding of motion but also enables scientists and mathematicians to predict future positions based on current velocities.In summary, momentary velocity is a fundamental concept in physics that describes the instantaneous speed and direction of an object at a particular moment. It differs from average velocity by focusing on a single point in time rather than an entire interval. The implications of momentary velocity extend beyond theoretical physics; they are applicable in various fields such as sports, engineering, and everyday life. By grasping the concept of momentary velocity, we gain a better understanding of motion and the forces that govern it, allowing us to apply this knowledge in practical situations and enhance our comprehension of the physical world around us.

在物理学的研究中，特别是在力学领域，瞬时速度的概念对于理解物体的运动至关重要。瞬时速度被定义为物体在特定时间瞬间的速度，它提供了关于物体在那个精确时刻的移动速度和方向的洞察。这与平均速度不同，后者考虑的是在一段时间内的总位移。瞬时速度的重要性在于它能够描述运动的瞬时变化，这对于分析动态系统是必不可少的。为了说明这一概念，考虑一辆沿直路行驶的汽车。当驾驶员加速和减速时，汽车的速度并不是恒定的。在任何给定的秒钟，汽车都有一个特定的速度和方向，可以描述为它的瞬时速度。例如，如果汽车在接近红绿灯时加速到每小时60公里，那么那一瞬间的瞬时速度就是60公里/小时。然而，如果驾驶员突然踩下刹车，瞬时速度将迅速改变，反映出汽车减速后的新速度。理解瞬时速度对于各种现实世界的应用尤为重要。在体育运动中，例如，教练和运动员分析运动员的瞬时速度以提高表现。短跑运动员在比赛期间达到最大速度的能力可以通过检查他们在赛道上不同点的瞬时速度来评估。同样，在机器人技术领域，工程师必须计算机器手臂的瞬时速度以确保制造过程的精确性。此外，瞬时速度的概念是微积分理解的核心，与位置函数对时间的导数相关。导数使我们能够通过计算位置-时间图上某一点的切线斜率来确定物体的瞬时速度。这种数学方法不仅提供了对运动更深入的理解，还使科学家和数学家能够根据当前速度预测未来的位置。总之，瞬时速度是物理学中的一个基本概念，描述了物体在特定时刻的瞬时速度和方向。它通过关注单个时间点而不是整个时间间隔，与平均速度不同。瞬时速度的影响超越了理论物理；它在体育、工程和日常生活等各个领域都有应用。通过掌握瞬时速度的概念，我们能够更好地理解运动及其所支配的力量，从而使我们能够在实际情况下应用这一知识，并增强我们对周围物理世界的理解。