lever arm

简明释义

杠杆臂

英英释义

例句

1.In physics, the concept of lever arm (杠杆臂) is crucial for calculating moments.

在物理学中，lever arm (杠杆臂) 的概念对于计算力矩至关重要。

2.The longer the lever arm (杠杆臂), the less force is needed to lift a heavy object.

越长的lever arm (杠杆臂)，抬起重物所需的力量就越小。

3.When using a wrench, the handle acts as a lever arm (杠杆臂) to increase torque.

使用扳手时，手柄作为lever arm (杠杆臂) 来增加扭矩。

4.In a seesaw, the distance from the pivot to the child is the lever arm (杠杆臂) that determines how easily they can lift the other side.

在秋千上，从支点到孩子的距离是决定他们多容易抬起另一边的lever arm (杠杆臂)。

5.The lever arm (杠杆臂) in this pulley system allows for easier lifting of heavy loads.

这个滑轮系统中的lever arm (杠杆臂) 使得抬起重物更容易。

作文

In physics, the concept of a lever arm is crucial for understanding how forces can be applied to create movement. The lever arm refers to the distance from the pivot point or fulcrum to the point where the force is applied. This distance plays a significant role in determining the effectiveness of the force being used. For example, when using a lever to lift a heavy object, the longer the lever arm, the less force is needed to lift that object. This principle is not only applicable in theoretical physics but also in everyday life. Consider the classic example of using a seesaw. The seesaw's pivot point is in the center, and the two individuals sitting on either end apply their weight to one side or the other. If one person is significantly heavier than the other, they can still balance the seesaw by adjusting their position along the lever arm. By moving closer to the pivot, the heavier person effectively shortens their lever arm, allowing them to balance with the lighter individual who has a longer lever arm. This simple illustration shows how the length of the lever arm can influence balance and stability.Moreover, the concept of the lever arm extends beyond physical devices like levers and seesaws. In sports, athletes often utilize the principles of the lever arm to enhance their performance. For instance, a baseball player swinging a bat uses the lever arm created by their arms and the bat to generate speed and power. The further the hands are from the pivot point (the player's body), the greater the lever arm effect, resulting in a more powerful swing. This application of physics is what allows players to hit the ball with such force.Additionally, in engineering and construction, understanding the lever arm is vital for designing safe and efficient structures. Engineers must calculate the lever arm when determining how much weight a beam can support or how to distribute loads evenly across a structure. If the lever arm is too short for the amount of weight placed on it, the structure may fail, leading to catastrophic consequences. Therefore, knowing how to manipulate and measure the lever arm is essential for anyone involved in these fields.In conclusion, the lever arm is a fundamental concept that permeates various aspects of physics, sports, and engineering. Understanding how it works can lead to better decision-making in practical applications, whether lifting heavy objects, improving athletic performance, or designing robust structures. By grasping the significance of the lever arm, individuals can apply this knowledge to enhance their effectiveness in both theoretical and real-world scenarios. This understanding not only enriches one's comprehension of physical principles but also empowers them to utilize these principles in everyday life.

在物理学中，杠杆臂的概念对于理解力量如何被施加以产生运动至关重要。杠杆臂指的是从支点或支撑点到施加力的点之间的距离。这一距离在决定施加的力量的有效性方面发挥了重要作用。例如，当使用杠杆来提升重物时，杠杆臂越长，提升该物体所需的力量就越小。这个原理不仅适用于理论物理，也适用于日常生活。考虑经典的秋千例子。秋千的支点位于中心，两侧坐着的两个人施加他们的重量到一侧或另一侧。如果一个人明显比另一个人重，他们仍然可以通过调整自己在杠杆臂上的位置来平衡秋千。通过靠近支点，较重的人有效地缩短了他们的杠杆臂，使他们能够与拥有更长杠杆臂的较轻个体平衡。这个简单的例子展示了杠杆臂的长度如何影响平衡和稳定性。此外，杠杆臂的概念超越了像杠杆和秋千这样的物理装置。在运动中，运动员经常利用杠杆臂的原理来提高他们的表现。例如，挥动棒球棒的棒球运动员利用他们的手臂和棒球棒形成的杠杆臂来产生速度和力量。手离支点（运动员的身体）越远，杠杆臂效应就越大，从而导致更有力的挥杆。这种物理应用就是为什么运动员能够如此有力地击打球。此外，在工程和建筑中，理解杠杆臂对于设计安全高效的结构至关重要。工程师必须在确定梁能够支撑多少重量或如何均匀分配负载时计算杠杆臂。如果杠杆臂对于施加的重量来说过短，结构可能会失败，导致灾难性的后果。因此，知道如何操控和测量杠杆臂对于任何参与这些领域的人来说都是必不可少的。总之，杠杆臂是一个基本概念，渗透到物理学、运动和工程的各个方面。理解它的工作原理可以在实际应用中做出更好的决策，无论是提升重物、改善运动表现还是设计稳固的结构。通过掌握杠杆臂的重要性，个人可以将这一知识应用于提高他们在理论和现实场景中的有效性。这种理解不仅丰富了一个人对物理原理的理解，还赋予他们在日常生活中利用这些原理的能力。