resultant velocity

简明释义

合成速度

英英释义

例句

1.To calculate the resultant velocity of a cyclist going downhill while pedaling, you need to consider both gravity and pedaling force.

要计算一名骑自行车者在下坡时踏板的合成速度，需要考虑重力和踏板力量。

2.For a plane flying against a headwind, the resultant velocity is less than its airspeed.

对于一架迎着逆风飞行的飞机，其合成速度低于其空速。

3.The boat's speed across the river is determined by its resultant velocity, which combines the speed of the boat and the current of the water.

船在河流中的速度由其合成速度决定，该速度结合了船的速度和水流的速度。

4.When two cars are traveling in different directions, their resultant velocity can be calculated to determine their collision course.

当两辆车朝不同方向行驶时，可以计算它们的合成速度以确定它们的碰撞轨迹。

5.In physics class, we learned how to find the resultant velocity of an object moving at an angle.

在物理课上，我们学习了如何找到一个以角度移动的物体的合成速度。

作文

In the world of physics, understanding motion is crucial, and one of the key concepts in this area is resultant velocity. The term refers to the overall velocity of an object when multiple velocities are acting on it simultaneously. This concept is not only fundamental in physics but also has practical applications in various fields such as engineering, aviation, and even everyday life. To grasp the idea of resultant velocity, we must first understand what velocity means. Velocity is a vector quantity, which means it has both magnitude and direction. For instance, if a car is traveling north at 60 kilometers per hour and then turns east at the same speed, we need to consider both directions to determine its resultant velocity.When calculating resultant velocity, we often use vector addition. This involves breaking down each individual velocity into its components, typically along the x and y axes, and then summing these components. For example, if the aforementioned car is moving north and then turns east, we can represent its northward movement as a vertical vector and its eastward movement as a horizontal vector. By applying the Pythagorean theorem, we can find the magnitude of the resultant velocity, while trigonometric functions help us determine the angle of this resultant with respect to a reference direction.The significance of resultant velocity extends beyond theoretical applications. In aviation, for instance, pilots must consider wind velocity when calculating their flight paths. If a plane is flying at a certain speed and encounters a headwind, the resultant velocity will be less than the plane's airspeed, affecting its arrival time and fuel efficiency. Similarly, in sports, athletes often need to adjust their movements based on the velocities of other players or external factors like wind or water currents. Understanding how to calculate resultant velocity can give them a competitive edge.Moreover, in the context of safety, understanding resultant velocity can help in designing vehicles and structures that can withstand different forces. Engineers must account for all possible velocities acting on a structure during events such as earthquakes or high winds. By analyzing the resultant velocity, they can ensure that buildings and bridges remain safe and stable under various conditions.In summary, the concept of resultant velocity is vital for comprehending how objects move when influenced by multiple forces. From everyday scenarios to complex engineering designs, understanding how to calculate and interpret resultant velocity allows us to make informed decisions and predictions about motion. As we continue to explore the principles of physics, the importance of resultant velocity will undoubtedly remain a cornerstone of our understanding of motion and dynamics in the physical world.

在物理学的世界中，理解运动至关重要，其中一个关键概念就是合成速度。这个术语指的是当多个速度同时作用于一个物体时，该物体的整体速度。这个概念不仅在物理学中是基础性的，而且在工程、航空甚至日常生活等多个领域都有实际应用。要掌握合成速度的概念，我们首先必须理解速度的含义。速度是一个矢量量，这意味着它具有大小和方向。例如，如果一辆车以每小时60公里向北行驶，然后以相同的速度向东转弯，我们需要考虑两个方向来确定它的合成速度。在计算合成速度时，我们通常使用矢量加法。这涉及将每个单独的速度分解为其分量，通常沿着x轴和y轴，然后将这些分量相加。例如，如果上述车辆向北移动然后向东转弯，我们可以将其北向运动表示为一个垂直矢量，东向运动表示为一个水平矢量。通过应用勾股定理，我们可以找到合成速度的大小，而三角函数帮助我们确定该合成速度相对于参考方向的角度。合成速度的重要性不仅限于理论应用。在航空领域，飞行员在计算飞行路径时必须考虑风速。如果一架飞机以某一速度飞行并遇到逆风，则合成速度将小于飞机的空速，从而影响到其到达时间和燃油效率。类似地，在体育运动中，运动员常常需要根据其他运动员的速度或外部因素（如风或水流）调整他们的动作。理解如何计算合成速度可以使他们在竞争中占据优势。此外，在安全方面，理解合成速度可以帮助设计能够承受不同力量的车辆和结构。工程师必须考虑在地震或强风等事件中作用于结构的所有可能速度。通过分析合成速度，他们可以确保建筑物和桥梁在各种条件下保持安全和稳定。总之，合成速度的概念对于理解在多种力的影响下物体如何运动至关重要。从日常场景到复杂的工程设计，理解如何计算和解释合成速度使我们能够对运动做出明智的决策和预测。随着我们继续探索物理原理，合成速度的重要性无疑将继续成为我们理解物理世界中运动和动力学的基石。