Physical force acts, what is force physically

1.In the first 5 seconds, there is no initial velocity and the net force is not 0, so the acceleration is 1n and the direction is due east.

In the last 10s, there is an initial velocity of 2m s2 5s = 10m s towards the east, and a resultant force towards the north, so it moves in a uniform variable speed curve. Acceleration, the direction of acceleration is due north.

At the end of the second, the object has a velocity of 10 m s towards the east and a velocity of 10 s 1 m s2 = 10 m s towards the north, so the combined velocity is 10 2 meters per second, and the direction is 45 degrees east-north, or 45 degrees north-east.

1) The first 5s do uniform acceleration linear motion, and the last 10s do curved motion;

2) The acceleration of the first 5s is a1=f1 m=1n, and the velocity at the end of 5s is v=a1t1=10m s, and the direction is due east.

Within 5s and 15s: the acceleration is a2=f2 m=

vx = v = 10m s, vy = a2t2 = 10m s, velocity v = root number [(vx) 2+(vy) 2] = 10 root number 2m s, direction due northeast.

Definition: Force is the interaction between objects Magnitude, direction, and point of application are the three elements of force.

SI unit: Newton, abbreviated as bull, the symbol is nIt was named in honor of the British scientist Isaac Newton.

Properties: 1. Materiality: force is the effect of an object on an object, an object is affected by a force, there must be another object to exert this effect on it, and the force cannot be separated from the object and exist independently.

2. Reciprocity: The action between any two objects is always mutual, and the object applying force must also be the object under force.

The force can change the shape of an object and can also change the state of motion of an object.

1. Which forces are interacting forces.

2. What is the role of force?

3. What is the role of force, the symbol of force.

4. What is the force of force?

1.Force is the result of the action of an object on an object, or the interaction between matter and matter.

2.The magnitude, direction, and application point of force are the three elements of force.

3.A force cannot exist separately from an object, and the action of a force can also occur between two objects that are not in direct contact.

4.The effect of force is that it can change the shape of an object and also change the state of motion of an object.

5.According to the nature of force, it can be divided into: gravity, gravitational force, elastic force, frictional force, molecular force, electromagnetic force, nuclear force, etc.

6.According to the effect of force, it can be divided into: tension, tension, pressure, support force, power, resistance, centripetal force, recovery force, etc.

Force is the energy manifestation and essence of particles, atoms, molecules, substances, cells, and life, force and energy are cause and effect of each other, energy forms force, and the balance of force forms the material structure to ensure the continuous formation of energy, both internal binding force, without this force, there would be no universe, atoms, cells, planets and other things. Without the binding force of matter, nothing exists. The external force of material energy is the thrust and gravitational force, which is the essence of the movement of matter, and the structural force and the moving force are the comprehensive force of the universe and the essence of the existence of all things.

Force is one of the basic concepts in mechanics and is the external cause that causes an object to change its state of motion or deformity. In dynamics, it is equal to the product of the mass of the object and the acceleration.

Force is the action of an object on an object, and force cannot exist independently of the object. The action of force can also arise between two objects that are not in direct contact. The action of force is reciprocal.

Force is one of the basic concepts in mechanics and is the fundamental reason for the change of motion or deformation of objects.

Force is the action of an object on an object, and the pushing, pulling, lifting, pressing, blowing, repulsing, attracting, etc. of an object to another object is called the action of an object on an object, <>

The pushing, pulling, lifting, pressing, blowing, repulsing, attracting, etc., of one object to another is called object-to-object action. That is, the effect of one object on another object in a hole is called force.

A force necessarily involves two objects, one is the object on which the force is applied and the other is the object on which the force is applied. When the force is applied to the force, it is also affected by the force of the force, that is, the force between the objects is reciprocal.

Plato's concept of force is essentially immaterial, and he believed that the nature of motion is given by nature solely because of an immortal living spirit. The final source of all forces in nature is the hidden soul of the world, which is the root of all physical activity. Of course, this metaphysical view is difficult to explain the kind of motion that gravity produces.

Effect: Within the scope of mechanics, the so-called deformation refers to the change in the shape or volume of an object. The so-called change in the state of motion 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 is generated.

It is usually said that the object is subjected to a force, and the object of force is not specified, but the object of force must exist.

Whether it is a force between objects in direct contact or a force between objects in indirect contact; Neither the force action between macroscopic objects nor the force action between microscopic objects can exist independently of the object.

The action of force, like the motion of matter, is carried out through time and space. Moreover, the amount of change in the state of motion of an object, or the amount of change in the shape of an object, depends on the cumulative effect of forces on time and space. According to the definition of force, for any object, the force is in the same direction as the acceleration it produces, and its magnitude is directly proportional to the acceleration produced by the object.

According to the effect of force, it is classified as: tensile force, pressure, support force, power, resistance, attraction, repulsive force, centripetal force, buoyancy, etc.; According to the nature of force, it is classified as gravity, elastic force, friction force, gravitational force, molecular force, electric field force, magnetic field force, and various field forces.

Strong interaction force, weak interaction force, electromagnetic force, gravitational force.

In mechanics: gravity, elasticity, friction;

Molecular mechanics in thermal: electromagnetic force;

In atomic physics: nuclear force.

The interaction between objects is called "force". When an object is acted upon by other objects, it can cause the object to gain acceleration (change in velocity or momentum) or deform the object, which is called "force". Force is the action of an object on an object, and force cannot exist independently of the object.

The action of force can also arise between two objects that are not in direct contact.

Materiality: Force is the action of an object (matter, mass) on an object (matter, mass), an object is affected by a force, there must be another object exerting this effect on it, and the force cannot exist independently of the object.

Reciprocity (interaction force) comma: The action between any two objects is always reciprocal, and the object applying force must also be the object under force. As long as one object exerts a force on another object, the stressed object in turn will certainly add a force to the object to which the force is applied.

Generating conditions: The forces are equal in magnitude (the resultant force is zero and in a directionless state of stationary motion) or unequal, in opposite directions, acting on two different objects and acting on the same straight line. In a nutshell:

Foreign Body, Equivalence, Inverse, Collinear. A pair of interacting forces must arise and disappear at the same time. ）

Vectorality: A force is a vector quantity that has both magnitude and direction.

Simultaneity: The force is generated at the same time and disappears at the same time.

Independence: The action of one force does not affect the action of the other force.