What is Force in Physics? Force is encountered every day — from walking, placing an object on a surface, throwing an object in the air, and even the regular variation of ocean tides. What is force? A force is a push or a pull and a product of the interaction between two or more ...
A. force B. power C. both D. neither 相关知识点: 试题来源: 解析 B。解析:force指的是力,是物体对物体的作用。而power在物理中表示功率,功率是表示做功快慢的物理量,也就是做功的能力。所以这里应该选power,A选项force不符合题意,C选项both错误,D选项neither也不符合。反馈...
In physics, flux is a measure of the number of electric or magnetic field lines passing through a surface in a given amount time. Field lines provide a mechanism for visualizing the magnitude and direction of the field being measured. They are imaginary lines that follow different patterns, dep...
In physics, the weight of an object is the gravitational force with which Earth attracts it; ___, if a man weighs 150 pounds, this means that Earth pulls him down with a force of 150 pounds.在物理学中,物体的重量是地球吸引它的引力;___,如果一个人重150磅,这意味着地球以150磅的力把他...
The Basics: What Is a Vector? The first step to understanding what it means to calculate the magnitude of a force in physics is to learn what a vector is. A "scalar" is a simple quantity that just has a value, such as temperature or speed. When you read a temperature of 50 degrees...
C. (1979). Force (God) in Descartes’ physics. Studies in History and Philosophy of Science, 10, 113-140. doi:10.1016/0039-3681(79)90013-XHatfield, G. ( 1979 ). ‘ Force (God) in Descartes' Physics ,’ Studies in History and Philosophy of Science 10 , pp. 113 – 140 ....
In physics, “work” is equal to force multiplied by___. A. time B. distance C. speed D. acceleration 相关知识点: 试题来源: 解析 B。在物理学中,功等于力乘以距离。time 是时间;distance 是距离;speed 是速度;acceleration 是加速度。本题考查物理公式以及词汇理解,功的计算公式是 W = Fs,即力...
What Is Symmetry in Physics? In physics,symmetryrefers to how particles behave when space, time, or quantum numbers are reversed. We’re used to seeing simple types of symmetry in everyday life. For example, a human face is very nearly symmetrical when reflected left to right. But a face...
In physics, work meansmoving an object when there is some resistance to its movement. Every timewe lift an object, push it, pull it or carry it, we are doing work.Two things are necessary for work to occur. First, force—or energy—must be applied to the object. If no energy is ...
Force is a quantitative description of an interaction that causes a change in an object's motion. An object mayspeedup, slow down, or change direction in response to a force. Put another way, force is any action that tends to maintain or alter the motion of a body or to distort it. O...