lever arm

简明释义

横倾力臂

英英释义

例句

1.The mechanic adjusted the lever arm (杠杆臂) on the jack to lift the car more efficiently.

机械师调整了千斤顶上的杠杆臂，以更有效地抬起汽车。

2.When using a crowbar, the lever arm (杠杆臂) allows you to pry open the door with minimal effort.

使用撬棍时，杠杆臂使您能够以最小的努力撬开门。

3.In physics class, we learned that the longer the lever arm (杠杆臂), the less force is needed to lift a heavy object.

在物理课上，我们了解到，杠杆臂越长，举起重物所需的力量就越小。

4.In engineering, understanding the lever arm (杠杆臂) is crucial for designing effective machines.

在工程学中，理解杠杆臂对设计有效的机器至关重要。

5.A child's seesaw demonstrates how a longer lever arm (杠杆臂) can balance heavier weights.

儿童的跷跷板演示了较长的杠杆臂如何平衡更重的重量。

作文

In physics, the concept of a lever arm is crucial for understanding how levers work and how they can be used to amplify force. A lever arm refers to the distance from the fulcrum, or pivot point, to the point where the force is applied. This distance plays a significant role in determining the mechanical advantage of a lever system. The longer the lever arm, the greater the force that can be exerted with less effort. This principle is not only applicable in theoretical physics but also in everyday life scenarios. For instance, when using a seesaw, the position of the individuals sitting on either side affects how easily one person can lift the other. If one person sits further away from the fulcrum, they will have a longer lever arm and can lift the other person more easily, demonstrating the practical implications of this concept.Furthermore, the lever arm is not limited to simple machines like levers but extends to various fields such as biomechanics and engineering. In biomechanics, the lever arm can be seen in the human body, where bones act as levers and muscles apply force at certain points. For example, during a bicep curl, the elbow acts as the fulcrum, the forearm represents the lever arm, and the bicep muscle exerts force to lift the weight. The effectiveness of this movement depends on the length of the lever arm created by the forearm's position relative to the elbow joint.Moreover, in engineering, the lever arm is a vital consideration when designing structures and mechanisms. Engineers must calculate the appropriate lengths of lever arms to ensure that machines operate efficiently and safely. For example, in cranes, the lever arm affects how much weight can be lifted and how stable the crane remains while lifting heavy loads. Understanding the principles of the lever arm allows engineers to optimize designs, ensuring that they can handle the required forces without compromising safety.In conclusion, the lever arm is a fundamental concept that illustrates the relationship between force, distance, and mechanical advantage in various applications. Whether in physics, biomechanics, or engineering, understanding how to manipulate the lever arm can lead to more effective solutions and innovations. By recognizing the importance of the lever arm, we can better appreciate the mechanics behind simple tools and complex machines alike, ultimately enhancing our ability to solve problems and create efficient systems in our daily lives.

在物理学中，lever arm（杠杆臂）的概念对于理解杠杆的工作原理以及如何利用它们来放大力量至关重要。lever arm是指从支点（或称为轴心）到施加力的点之间的距离。这个距离在决定杠杆系统的机械优势方面起着重要作用。lever arm越长，施加更少的努力就能产生更大的力量。这一原理不仅适用于理论物理，还适用于日常生活场景。例如，在使用秋千时，坐在两侧的人位置会影响一个人多容易地抬起另一个人。如果一个人坐得离支点更远，他们将拥有更长的lever arm，因此可以更轻松地抬起另一个人，这展示了这一概念的实际意义。此外，lever arm并不限于简单的机器，如杠杆，它还扩展到生物力学和工程等多个领域。在生物力学中，lever arm可以在人体中看到，其中骨骼充当杠杆，肌肉在特定点施加力量。例如，在二头肌弯举时，肘部充当支点，前臂代表lever arm，而二头肌则施加力量来举起重量。这一动作的有效性取决于前臂相对于肘关节位置所形成的lever arm的长度。此外，在工程学中，lever arm是设计结构和机制时的重要考虑因素。工程师必须计算适当的lever arm长度，以确保机器高效且安全地运行。例如，在起重机中，lever arm影响能够提升的重量以及起重机在提升重物时的稳定性。理解lever arm的原理使工程师能够优化设计，确保它们能够承受所需的力量，而不妨碍安全。总之，lever arm是一个基本概念，说明了力量、距离和机械优势在各种应用中的关系。无论是在物理学、生物力学还是工程学中，理解如何操控lever arm可以带来更有效的解决方案和创新。通过认识到lever arm的重要性，我们可以更好地欣赏简单工具和复杂机器背后的机械原理，从而最终增强我们解决问题和创建高效系统的能力。