final velocity

简明释义

最终速度

英英释义

例句

1.The rocket's final velocity was measured just before it entered orbit.

火箭的最终速度在进入轨道前被测量。

2.To calculate the final velocity, we need to know the initial speed and acceleration.

要计算最终速度，我们需要知道初始速度和加速度。

3.After applying the brakes, the train's final velocity decreased significantly.

刹车后，火车的最终速度显著降低。

4.In free fall, the object's final velocity depends on air resistance.

在自由下落中，物体的最终速度取决于空气阻力。

5.The car accelerated until it reached its final velocity.

这辆车加速直到达到它的最终速度。

作文

In the study of physics, understanding motion is crucial. One of the key concepts in kinematics is the idea of velocity, particularly the concept of final velocity. The term final velocity refers to the speed and direction of an object at the end of a given time interval. This concept is essential when analyzing how objects move under various forces and conditions. To illustrate the importance of final velocity, consider a car that accelerates down a highway. If the car starts from rest and speeds up to 60 miles per hour over a period of 10 seconds, its final velocity would be 60 miles per hour in the direction of travel. This information is vital for understanding not only how fast the car is moving but also for calculating other related quantities such as acceleration and distance traveled.The formula used to calculate final velocity can be derived from the basic equations of motion. If we know the initial velocity, the acceleration, and the time, we can use the equation: final velocity = initial velocity + (acceleration × time).This equation allows us to predict the final velocity of an object given its starting conditions and the forces acting on it. For example, if a ball is thrown upwards with an initial velocity of 20 meters per second and it decelerates due to gravity at a rate of 9.81 meters per second squared, after 2 seconds, the final velocity can be calculated as follows:final velocity = 20 m/s + (-9.81 m/s² × 2 s) = 20 m/s - 19.62 m/s = 0.38 m/s. This calculation shows that the ball is still moving upward at a very slow speed before it starts to descend, illustrating how final velocity can change depending on the forces acting on an object. Understanding final velocity is not just limited to theoretical calculations; it has practical applications in everyday life. For instance, engineers must consider the final velocity of vehicles to ensure safety in design. Knowing how fast a car will be traveling at the end of a road segment can help in designing safer roads, traffic signals, and even emergency response strategies. Moreover, sports science relies heavily on understanding final velocity to enhance athletic performance. Coaches analyze the final velocity of athletes during races or jumps to identify areas for improvement. By measuring how fast an athlete finishes a race, trainers can develop better training programs tailored to increase speed and efficiency. In conclusion, the concept of final velocity is fundamental in the study of motion. It not only helps us understand the dynamics of moving objects but also applies to various fields such as engineering and sports science. By mastering the concept of final velocity, we gain valuable insights into both theoretical and practical aspects of motion, allowing us to make informed decisions based on how objects behave under different conditions.

在物理学的研究中，理解运动至关重要。运动学中的一个关键概念是速度的概念，特别是最终速度的概念。术语最终速度指的是物体在给定时间间隔结束时的速度和方向。这个概念在分析物体在各种力和条件下的运动时至关重要。为了说明最终速度的重要性，考虑一辆汽车在高速公路上加速。如果汽车从静止开始，在10秒内加速到每小时60英里，那么它的最终速度将是每小时60英里，朝着行驶的方向。这些信息对于理解汽车的行驶速度以及计算其他相关量（如加速度和行驶距离）是非常重要的。用于计算最终速度的公式可以从基本运动方程中推导出来。如果我们知道初始速度、加速度和时间，我们可以使用以下方程：最终速度 = 初始速度 + (加速度 × 时间)。这个方程允许我们根据物体的起始条件和作用于其上的力来预测最终速度。例如，如果一个球以每秒20米的初始速度向上抛出，并且由于重力以每秒平方9.81米的速率减速，那么在2秒后，可以按如下方式计算最终速度：最终速度 = 20 m/s + (-9.81 m/s² × 2 s) = 20 m/s - 19.62 m/s = 0.38 m/s。这个计算表明，球仍然以非常慢的速度向上移动，然后才开始下降，说明了最终速度如何根据作用于物体的力而变化。理解最终速度不仅限于理论计算；它在日常生活中有实际应用。例如，工程师必须考虑车辆的最终速度以确保设计安全。知道汽车在一段道路末尾的行驶速度可以帮助设计更安全的道路、交通信号，甚至紧急响应策略。此外，运动科学在提高运动表现方面也严重依赖于理解最终速度。教练分析运动员在比赛或跳跃中的最终速度以识别改进的领域。通过测量运动员完成比赛的速度，训练师可以制定更好的训练计划，以增加速度和效率。总之，最终速度的概念在运动研究中是基础的。它不仅帮助我们理解运动物体的动态，还应用于工程和运动科学等多个领域。通过掌握最终速度的概念，我们获得了对运动的理论和实践方面的宝贵见解，使我们能够根据物体在不同条件下的行为做出明智的决策。