* Question
| What are the three elements of force?What is power? |
* Answer
| The size, direction and point of action of the force are collectively referred to as the “three elements of force.”Line segments are often used to indicate force.The length of the line segment is proportional to the force, the arrow indicates the direction of the force, and the starting point of the line segment indicates the point of action of the force.In the above way, the force is called “the graphic method of force”.In the context of mechanics, so-called deformation refers to the change in the shape and volume of an object.The so-called change in motion state refers to the change in the velocity of the object, including the change in the magnitude or direction of the velocity, that is, the acceleration.Force is the interaction between objects (or matter).Whether it is the force between objects that are in direct contact, or the force between objects that are indirectly contacted; whether it is the force between macroscopic objects or the force between microscopic objects, they cannot exist separately from the object.
The effect of force is the same as the movement of matter through time and space.And the acceleration generated by the two forces acting on the same object is the vector sum of the accelerations generated by the two forces acting on the object respectively.Force is a vector. The magnitude, direction and point of action of force are important features that represent the effect of force. It is called the three elements of force.The synthesis and decomposition of forces obey the law of parallelograms.According to the effect of force, there are pressure, tension, support force, buoyancy, surface tension, repulsive force, gravity, resistance, power, centripetal force and so on.According to the nature of the force, there are gravity, elasticity, friction, molecular force, electromagnetic force, nuclear force and so on. |
COMMENTS