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, 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...
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...
moving at a speedvperpendicular to a magnetic field of strengthB. If the velocity is not perpendicular to the magnetic field, thenvis the component of the velocity perpendicular to the field. The component of the velocity parallel to the field is unaffected, since the magn...
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, “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...
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 ...
Physics - Force and PressurePrevious Quiz Next IntroductionWhen an object is either pushed or a pulled is known as a force. Motion, generated in an object, is because of an action of a force.The applied force makes the table move in a given direction. The strength of a force is ...
Physics is the science that is concerned with studying the fundamental relationships that exist between all aspects of matter and energy. The matter is anything that has a volume and a mass. Key Ideas:There are two basic forms of equilibrium in Physics: Dynamic equilibrium (for objects in ...