强力与动量
力和动量是在力学中使用的两个概念来描述身体的静态或动力学。力量和动力是物理中涉及的基础和基本概念之一。对既有力量又有力量有很好的理解,以便在任何与物理学遥远的领域中表现出色,这一点至关重要。我们将看到,力量和动力的概念具有许多变化和形式,这些变化和形式在许多方面都有用。不同的形式用于不同方法进行计算。在本文中,我们将看到什么力量和动力,力和动量的定义,力量和动力的类型,它们的相似性以及最终的差异。
力量
力的共同解释的能力to do work. However, all forces do not do work. Some forces merely attempt to do work, and, there are other causes to work apart from force. Heat is also capable of doing work. The proper definition of force is “any influence that causes or attempt to cause a free body to undergo a change in the acceleration or the shape of the body.” Acceleration can be changed either by changing the velocity of the object or by changing the direction of the object or both. There are two main types of forces according to the classical model. Namely, contact forces and forces at a distance (or commonly known as field forces). Contact forces are forces used in everyday incidents such as pushing or pulling an object. Field forces include gravitational forces, magnetic forces, and electric forces. Forces such as static friction, surface tension, and reactive forces are responsible for keeping the objects in static conditions. Forces such as gravitational force, electric force, and magnetic force are responsible for keeping the world and the cosmos together. If a net force is acting upon any object, the object must have an acceleration, which is proportional to the force and inversely proportional to the mass of the object. In SI units, F = ma, where F is the net force, m is the mass of the object, and a is the acceleration. Force is measured in newton named in honor of Sir. Isaac Newton.
势头
动量是对物体惯性的测量。它分为两种主要类型。一种是线性动量,另一个是角动量。线性动量定义为物体质量和速度的乘积。角动量定义为惯性矩和物体角速度的产物。这两者都是对系统当前惯性的测量,这告诉我们改变系统状态是多么困难。动量的改变总是需要净力或扭矩作用于物体。动量是相对论的变体。但是,角动量是物质的基本特性之一,在任何地方都保守。
力量和动量有什么区别? •力是外部原因,而动量是物质的内部特性。 • A force is required to change the momentum of any object. •对象上的净力可以定义为每单位时间动量的变化。 •力和动量都是向量。 •力是动量的时间导数。 |
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