acceleration from rest

简明释义

起动加速度

英英释义

例句

1.In physics class, we learned about acceleration from rest using a toy car down a ramp.

在物理课上，我们使用玩具车下坡学习了从静止状态加速。

2.To understand acceleration from rest, we conducted an experiment with a marble and a ramp.

为了理解从静止状态加速，我们用弹珠和斜坡进行了实验。

3.The car experienced a rapid acceleration from rest when the light turned green.

当红灯变绿时，这辆车经历了快速的从静止状态加速。

4.The athlete demonstrated impressive acceleration from rest during the sprint.

这位运动员在短跑中展示了令人印象深刻的从静止状态加速。

5.The roller coaster's thrilling drops provide a perfect example of acceleration from rest.

过山车的惊险下降提供了一个完美的从静止状态加速的例子。

作文

In the realm of physics, the concept of acceleration from rest is fundamental to understanding how objects move. When we talk about an object accelerating from a state of rest, we are referring to the process by which an object increases its velocity starting from zero. This concept can be observed in various real-life scenarios, such as a car beginning to move from a stoplight or a runner taking off from the starting line of a race. The principles governing this phenomenon are not only fascinating but also essential for various applications in engineering and technology.To illustrate the idea of acceleration from rest, let us consider a simple example: a car at a traffic light. When the light turns green, the driver presses the gas pedal, and the car begins to move forward. Initially, the car's speed is zero, but as the driver accelerates, the car gains speed over time. The rate at which the car's speed increases is known as its acceleration. If the acceleration is constant, we can use the equations of motion to predict how far the car will travel in a given amount of time.Mathematically, the equation for distance traveled under constant acceleration can be expressed as:\[ d = vt + \frac{1}{2}at^2 \]where \(d\) is the distance, \(v\) is the initial velocity (which is zero in the case of acceleration from rest), \(a\) is the acceleration, and \(t\) is the time. In our scenario, since the initial velocity is zero, the equation simplifies to:\[ d = \frac{1}{2}at^2 \]This equation shows that the distance traveled by the car is directly proportional to the time squared, provided the acceleration remains constant. This relationship highlights the importance of understanding acceleration from rest in predicting the motion of objects.Another example of acceleration from rest can be seen in sports. Consider a sprinter at the starting blocks. When the starting gun sounds, the athlete pushes against the blocks and accelerates from a complete stop. The force exerted by the athlete’s legs propels them forward, and their speed increases rapidly. The initial phase of the sprint involves significant acceleration from rest, which is crucial for achieving maximum speed.Understanding acceleration from rest also has practical implications in safety and design. For instance, in automotive engineering, vehicles are designed to ensure that they can accelerate safely from a stop. Engineers must consider factors such as traction and engine power to optimize the car's performance. Similarly, in amusement parks, roller coasters are designed with specific acceleration from rest parameters to ensure a thrilling yet safe experience for riders.In conclusion, the concept of acceleration from rest is integral to our understanding of motion. Whether it is a car starting from a stoplight or an athlete sprinting from the starting blocks, this principle governs how objects increase their speed from a standstill. By studying the mechanics behind this phenomenon, we can apply these principles in various fields, enhancing our knowledge and improving designs in transportation, sports, and beyond. Therefore, grasping the concept of acceleration from rest is not only academically enriching but also practically beneficial in our daily lives.

在物理学领域，从静止状态加速的概念是理解物体运动的基础。当我们谈论一个物体从静止状态加速时，我们指的是一个物体从零开始增加其速度的过程。这个概念可以在各种现实生活场景中观察到，例如汽车从红绿灯开始移动或跑步者从比赛的起跑线出发。支配这一现象的原理不仅令人着迷，而且对于工程和技术的各种应用至关重要。为了说明从静止状态加速的想法，让我们考虑一个简单的例子：交通信号灯下的一辆汽车。当红灯变为绿灯时，司机踩下油门，汽车开始向前移动。最初，汽车的速度为零，但随着司机加速，汽车的速度随时间增加。汽车速度增加的速率被称为加速度。如果加速度是恒定的，我们可以使用运动方程来预测汽车在给定时间内行驶的距离。在恒定加速下，行驶距离的数学公式可以表示为：\[ d = vt + \frac{1}{2}at^2 \]其中\(d\)是距离，\(v\)是初始速度（在从静止状态加速的情况下为零），\(a\)是加速度，\(t\)是时间。在我们的场景中，由于初始速度为零，该方程简化为：\[ d = \frac{1}{2}at^2 \]这个方程表明，在加速度保持恒定的情况下，汽车行驶的距离与时间的平方成正比。这种关系突显了理解从静止状态加速在预测物体运动中的重要性。另一个从静止状态加速的例子可以在体育运动中看到。考虑一下起跑器上的短跑运动员。当发令枪响起时，运动员用力推动起跑器并从完全静止中加速。运动员腿部施加的力量将他们推向前方，他们的速度迅速增加。冲刺的初始阶段涉及显著的从静止状态加速，这对于达到最大速度至关重要。理解从静止状态加速在安全和设计方面也具有实际意义。例如，在汽车工程中，车辆被设计成能够安全地从静止状态加速。工程师必须考虑牵引力和发动机功率等因素，以优化汽车的性能。同样，在游乐园中，过山车的设计具有特定的从静止状态加速参数，以确保乘客的刺激体验同时又安全。总之，从静止状态加速的概念是我们理解运动的基础。无论是一辆车从红绿灯起步，还是一名运动员从起跑线冲刺，这一原则支配着物体如何从静止中增加速度。通过研究这一现象背后的力学原理，我们可以将这些原则应用于各个领域，增强我们的知识并改善交通、体育等方面的设计。因此，掌握从静止状态加速的概念不仅在学术上丰富，而且在我们的日常生活中也具有实用价值。