normal force

简明释义

法向力

英英释义

例句

1.On an inclined plane, the normal force 法向力 is less than the weight of the object due to the angle.

在斜面上，normal force 法向力 小于物体的重力，这是由于角度的原因。

2.When a book rests on a table, the table exerts a normal force 法向力 upward to support it.

当一本书放在桌子上时，桌子向上施加一个normal force 法向力 来支撑它。

3.During a roller coaster ride, the normal force 法向力 changes as the coaster goes up and down hills.

在过山车的过程中，随着过山车上下坡，normal force 法向力 会发生变化。

4.A person standing on a scale experiences a normal force 法向力 that equals their weight.

一个站在秤上的人经历的normal force 法向力 等于他们的重量。

5.The normal force 法向力 acting on a car parked on a flat surface balances its weight.

停在平坦表面上的汽车所受的normal force 法向力 与其重力相平衡。

作文

In physics, the concept of normal force is crucial for understanding how objects interact with surfaces. The normal force is defined as the force exerted by a surface to support the weight of an object resting on it. This force acts perpendicular to the surface, hence the term 'normal,' which in mathematics refers to a line or vector that is perpendicular to another line or surface. For instance, when a book lies flat on a table, the table exerts a normal force upward against the weight of the book, preventing it from falling through. The normal force is not always equal to the weight of the object. When an object is placed on an inclined surface, the normal force decreases because only a component of the gravitational force acts perpendicular to the surface. This principle is vital in various applications, such as determining the frictional force acting on an object. The frictional force depends on the normal force, which makes it essential in calculations involving motion and stability. Understanding the normal force also helps explain why certain objects can stay at rest or move without slipping. For example, a car parked on a hill relies on the normal force to keep it stationary. If the incline is too steep, the component of gravitational force parallel to the slope may exceed the maximum static frictional force, causing the car to slide down. This interplay between the normal force and friction illustrates the balance of forces that govern motion. Moreover, the normal force plays a significant role in various engineering applications. In construction, understanding how loads are distributed across beams and columns requires a solid grasp of the normal force. Engineers must calculate the normal force to ensure structures can support the weight they bear, preventing failures that could lead to catastrophic results. In conclusion, the normal force is a fundamental concept in physics that explains how objects interact with surfaces. It is vital for understanding motion, stability, and engineering principles. By grasping the significance of the normal force, one can better appreciate the mechanics behind everyday occurrences, from a book resting on a table to complex engineering designs. Ultimately, the normal force is a key player in the physical world, influencing how we perceive and interact with our environment.

在物理学中，法向力的概念对于理解物体与表面的相互作用至关重要。法向力被定义为表面施加的力，以支撑静止在其上的物体的重量。这个力是垂直于表面作用的，因此称为“法向”，在数学中指的是与另一条线或表面垂直的线或向量。例如，当一本书平放在桌子上时，桌子向上施加一个法向力，抵消书的重量，防止它掉落。 法向力并不总是等于物体的重量。当一个物体放置在倾斜的表面上时，法向力会减小，因为只有重力的一部分沿垂直于表面的方向作用。这一原理在各种应用中至关重要，例如确定作用在物体上的摩擦力。摩擦力依赖于法向力，这使得它在涉及运动和稳定性的计算中至关重要。 理解法向力还帮助解释为什么某些物体可以保持静止或在不滑动的情况下移动。例如，停在山坡上的汽车依靠法向力来保持静止。如果坡度太陡，沿坡面平行的重力分量可能超过最大静摩擦力，导致汽车滑下。这种法向力与摩擦之间的相互作用说明了控制运动的力的平衡。 此外，法向力在各种工程应用中也发挥着重要作用。在建筑中，理解负载如何在梁和柱之间分配需要对法向力有深入的了解。工程师必须计算法向力以确保结构能够承受其承载的重量，从而防止可能导致灾难性后果的失败。 总之，法向力是物理学中的一个基本概念，解释了物体与表面之间的相互作用。它对于理解运动、稳定性和工程原理至关重要。通过掌握法向力的重要性，人们可以更好地欣赏日常现象背后的机制，从一本书静置在桌子上到复杂的工程设计。最终，法向力是物理世界中的一个关键因素，影响着我们感知和与环境互动的方式。