“force”的概念、定义、翻译、参考文献-科学参考

force

Physics

Symbol F. The agency that tends to change the momentum of a massive body, defined as being proportional to the rate of increase of momentum. For a body of mass m travelling at a velocity v, the momentum is mv. In any coherent system of units the force is therefore given by F=d(mv)/dt. If the mass is constant F=mdv/dt=ma, where a is the acceleration (see Newton’s laws of motion). The SI unit of force is the newton. Forces occur always in equal and opposite action–reaction pairs between bodies, though it is often convenient to think of one body being in a force field.

Mathematics

A dynamic influence that causes a particle or body to accelerate. (See Newton’s laws of motion.) Commonly experienced forces are gravity, contact forces (such as friction and air resistance), forces within a body that deform or restore its shape, and electrical and magnetic forces.

In general, force is a vector quantity with a magnitude, a direction, and also a point of application. (See moment (in mechanics).) Force has the dimensions MLT⁻², and the SI unit of measurement is the newton.

Science and Technology

An interaction between two objects that causes the motion of one of them to change, e.g. by pushing or pulling, or accelerating from a stationary position. Force has both magnitude and direction and is, therefore, a vector quantity. It is measured in newtons (N), one newton being the force required to accelerate a mass of 1 kg by 1 m/s². The force may act between objects in physical contact, e.g. friction or tension, or at a distance, e.g. gravitational force, electromagnetic force.
Mike Allaby

Chemical Engineering

A physical agent that brings about a change in momentum. For a body of mass, m, travelling with a velocity, v, the momentum is mv. The agent that brings about a change in momentum is therefore:
$F = \frac{d (m v)}{d t} = m \frac{d v}{d t}$

The force is therefore directly proportional to the product of mass and acceleration of a body. That is F = ma. The SI unit is the newton (N).

单词	force
释义	force Physics Symbol F. The agency that tends to change the momentum of a massive body, defined as being proportional to the rate of increase of momentum. For a body of mass m travelling at a velocity v, the momentum is mv. In any coherent system of units the force is therefore given by F=d(mv)/dt. If the mass is constant F=mdv/dt=ma, where a is the acceleration (see Newton’s laws of motion). The SI unit of force is the newton. Forces occur always in equal and opposite action–reaction pairs between bodies, though it is often convenient to think of one body being in a force field. Mathematics A dynamic influence that causes a particle or body to accelerate. (See Newton’s laws of motion.) Commonly experienced forces are gravity, contact forces (such as friction and air resistance), forces within a body that deform or restore its shape, and electrical and magnetic forces. In general, force is a vector quantity with a magnitude, a direction, and also a point of application. (See moment (in mechanics).) Force has the dimensions MLT⁻², and the SI unit of measurement is the newton. Science and Technology An interaction between two objects that causes the motion of one of them to change, e.g. by pushing or pulling, or accelerating from a stationary position. Force has both magnitude and direction and is, therefore, a vector quantity. It is measured in newtons (N), one newton being the force required to accelerate a mass of 1 kg by 1 m/s². The force may act between objects in physical contact, e.g. friction or tension, or at a distance, e.g. gravitational force, electromagnetic force. Mike Allaby Chemical Engineering A physical agent that brings about a change in momentum. For a body of mass, m, travelling with a velocity, v, the momentum is mv. The agent that brings about a change in momentum is therefore: $F = \frac{d (m v)}{d t} = m \frac{d v}{d t}$ The force is therefore directly proportional to the product of mass and acceleration of a body. That is F = ma. The SI unit is the newton (N).
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