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Chapter 2

Force Vectors

标量和向量
标量和向量
In mechanics, commonly used terms like force, speed, velocity, and work can be classified as either scalar or vector quantities. A scalar is a physical ...
向量运算
向量运算
Vectors are physical quantities that have both magnitude and direction. The vector operations include addition, subtraction, and scalar multiplication. A ...
力简介
力简介
Consider water flowing from a nozzle to a turbine vane. As the water hits the turbine vane, it exerts a force that causes it to move along the flow of ...
力分类
力分类
Forces play a crucial role in the study of physics and engineering. They are essential in describing the motion, behavior, and equilibrium of objects in ...
力的矢量加法
力的矢量加法
When understanding the effects of multiple forces acting on an object, vector addition is a crucial concept to grasp. This mathematical concept can be ...
二维力系统
二维力系统
A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved ...
二维力系统:解决问题
二维力系统:解决问题
Solving problems related to two-dimensional force systems is an essential aspect of mechanics and engineering. By applying the principles of vector ...
标量表示法
标量表示法
Scalar notation is a useful method for simplifying calculations involving vectors. When vectors are added or subtracted, their components can be added or ...
笛卡尔向量表示法
笛卡尔向量表示法
Cartesian vector notation is a valuable tool in mechanical engineering for representing vectors in three-dimensional space, performing vector operations ...
向量的方向余弦
向量的方向余弦
Direction cosines, which help describe the orientation of a vector with respect to the coordinate axes, are an essential concept in the field of vector ...
三维力系统
三维力系统
In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z ...
三维力系统:解决问题
三维力系统:解决问题
A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is ...
位置向量
位置向量
A position vector is a fundamental concept in mathematics that helps determine the position of one point with respect to another point in space. It is a ...
沿直线的力矢量
沿直线的力矢量
Quite often in three-dimensional statics problems, the direction of a force is specified by two points through which its line of action passes. Consider a ...
点积
点积
The dot product is an essential concept in mathematics and physics. In engineering, the dot product of any two vectors is the product of the magnitudes of ...
点积:问题解决
点积:问题解决
The dot product is a powerful tool in problem-solving involving vectors, given that the dot product of two vectors is the product of their magnitudes and ...
矢积
矢积
The cross product is a fundamental concept in vector algebra that is a vector operation on two different vectors to obtain a third vector. Unlike the ...
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