mechanical advantage

简明释义

机械利益

英英释义

例句

1.The pulley system in the construction site offers a mechanical advantage that helps workers lift materials to great heights.

建筑工地上的滑轮系统提供了一个机械优势，帮助工人将材料提升到高处。

2.Bicycles are designed to give riders a mechanical advantage over walking, allowing them to travel faster with less energy.

自行车的设计使骑行者相对于步行拥有机械优势，让他们以更少的能量更快地移动。

3.When using an inclined plane, the mechanical advantage reduces the amount of force needed to lift a load.

使用斜面时，机械优势减少了提升负载所需的力量。

4.In a car engine, gears provide a mechanical advantage that increases torque and improves efficiency.

在汽车发动机中，齿轮提供了一个机械优势，增加了扭矩并提高了效率。

5.Using a lever provides a significant mechanical advantage that allows a person to lift heavy objects with less effort.

使用杠杆提供了显著的机械优势，使人们能够用更少的力气举起重物。

作文

The concept of mechanical advantage is fundamental in the field of physics and engineering. It refers to the factor by which a machine multiplies the force put into it. Essentially, it allows us to accomplish tasks that would otherwise require significantly more effort. Understanding mechanical advantage can help us appreciate the design and functionality of various tools and machines we use in our daily lives.To illustrate this concept, consider a simple lever. A lever consists of a rigid bar that pivots around a fixed point called the fulcrum. When you apply a force on one end of the lever, the other end can lift a heavier object. The ratio of the distance from the fulcrum to the point where the input force is applied, to the distance from the fulcrum to the load, determines the mechanical advantage. For example, if you push down on the lever with a force of 10 Newtons and lift an object weighing 50 Newtons, the mechanical advantage is 5. This means that the lever multiplies your input force by five times, making it easier to lift heavy objects.Similarly, pulleys utilize the principle of mechanical advantage. A single pulley does not provide any advantage in terms of force; however, when multiple pulleys are used together, they can significantly reduce the amount of force needed to lift an object. For instance, using a block and tackle system with four pulleys allows you to lift a heavy load with only a quarter of the weight's force. This is because the mechanical advantage increases with the number of pulleys in the system, allowing for more efficient lifting.In addition to levers and pulleys, gears also demonstrate the principle of mechanical advantage. Gears are circular mechanical components that transmit torque and rotational motion. When two gears of different sizes are meshed together, the smaller gear will rotate faster than the larger gear. This speed difference translates into a mechanical advantage in certain applications, such as in bicycles. When you shift gears while riding, you can either increase your speed or make pedaling easier, depending on the gear ratio.Understanding mechanical advantage is not only important in theoretical applications but also in practical scenarios. For instance, in construction, cranes rely heavily on this principle to lift heavy materials. By using a combination of pulleys and levers, cranes can move enormous weights with relative ease. This application of mechanical advantage allows construction projects to progress more efficiently and safely.Moreover, the concept of mechanical advantage extends beyond physical machines. In biology, certain organisms have evolved structures that provide them with a mechanical advantage in their environments. For example, the long neck of a giraffe enables it to reach high branches for food, effectively giving it an advantage over other herbivores that cannot access the same resources.In conclusion, mechanical advantage is a crucial concept that permeates various fields, from engineering to biology. It allows us to understand how machines work and how we can leverage them to perform tasks more efficiently. By grasping the principles of mechanical advantage, we can innovate and improve our tools, making our everyday tasks easier and more effective.

“机械优势”这一概念在物理学和工程学领域中至关重要。它指的是机器将输入的力量放大的倍数。本质上，它使我们能够完成那些否则需要显著更多努力的任务。理解“机械优势”可以帮助我们欣赏我们日常生活中使用的各种工具和机器的设计和功能。为了说明这个概念，考虑一个简单的杠杆。杠杆由一个刚性杆构成，该杆围绕一个固定点（称为支点）旋转。当你在杠杆的一端施加力量时，另一端可以抬起一个更重的物体。支点到施加输入力的点的距离与支点到负载的距离的比率决定了“机械优势”。例如，如果你用10牛顿的力量向下推杠杆并抬起一个重50牛顿的物体，那么“机械优势”就是5。这意味着杠杆将你的输入力量放大了五倍，使得抬起重物变得更容易。类似地，滑轮也利用“机械优势”的原理。单个滑轮在力量方面并没有提供任何优势；然而，当多个滑轮一起使用时，它们可以显著减少抬起物体所需的力量。例如，使用一个有四个滑轮的滑轮组，可以用仅相当于负重四分之一的力量来抬起重物。这是因为随着滑轮数量的增加，“机械优势”也随之增加，从而实现更高效的提升。除了杠杆和滑轮，齿轮也展示了“机械优势”的原理。齿轮是圆形的机械部件，用于传递扭矩和旋转运动。当两个不同大小的齿轮啮合在一起时，较小的齿轮将比较大的齿轮转动得更快。这种速度差异在某些应用中转化为“机械优势”，例如在自行车中。当你骑行时换档时，可以根据齿轮比来增加速度或使踏板变得更轻松。理解“机械优势”不仅在理论应用中重要，在实际场景中同样如此。例如，在建筑中，起重机在提升重材料时严重依赖这一原理。通过使用杠杆和滑轮的组合，起重机可以相对轻松地移动巨大的重量。这种“机械优势”的应用使得建筑项目能够更高效、更安全地推进。此外，“机械优势”的概念不仅限于物理机器。在生物学中，某些生物已经进化出提供它们在环境中“机械优势”的结构。例如，长颈鹿的长脖子使它能够够到高处的树枝以获取食物，有效地使其在无法接触相同资源的其他草食动物中占据优势。总之，“机械优势”是一个贯穿各个领域的重要概念，从工程到生物学。它使我们能够理解机器如何运作，以及我们如何利用它们更高效地执行任务。通过掌握“机械优势”的原理，我们可以创新和改进我们的工具，使日常任务变得更容易、更有效。