Is balance force a force
Publish: 2021-05-19 07:16:18
1. The equilibrium forces counteract each other, which is equivalent to being free from external forces. Therefore, there is a saying that "when a body is subjected to a balanced force, it is still or moving in a straight line at a constant speed.". In fact, the balance force is a pair of external forces that counteract each other. The balance force is an external force. I wonder if I have made it clear?
2. Complete analysis of different points
(1) the point of action of the force:
a pair of interaction forces: acting on two different objects respectively
for example, the pulling force of the rope to the lamp and the pulling force of the lamp to the rope are a pair of interaction forces, the former acting point is on the lamp, and the latter acting point is on the rope
a pair of balancing forces: acting on the same object
for example, the pull of the rope on the lamp and the gravity of the earth on the lamp are a pair of balance forces, and their action points are all on the lamp
[2] the nature of forces
a pair of interaction forces: they must be forces of the same nature
they are gravity, elasticity or friction. For example, when people push cars, the forward force of people on cars and the backward force of cars on people are a pair of interactive forces, which are elastic in nature
a pair of equilibrium forces: the nature of the forces is not necessarily the same
for example, the gravity and supporting force on an object on a horizontal table are a pair of balance forces. The nature of gravity is gravity, while the nature of supporting force is elasticity
[3] the effect proced
a pair of interaction forces: the effect proced by the action on different objects cannot offset each other. For example, the pull of the lamp to the rope and the pull of the rope to the lamp have different effects. The pull of the lamp to the rope will make the rope elongate, while the pull of the rope to the lamp will make the lamp not fall. These two effects cannot offset each other
a pair of balance forces: the effects proced by acting on the same object cancel each other. For example, a Book placed on a horizontal table is subject to a pair of balance forces of gravity and supporting force, and their effects counteract each other to keep the book still
[4] relationship with time
a pair of interaction forces: generated at the same time and disappeared at the same time, with instantaneous corresponding relationship. For example, when people push the car, the forward force and the backward force are proced at the same time. Once the cart is stopped, the force of the car on people disappears
there is no such instantaneous corresponding relationship between a pair of equilibrium forces. If one of the forces is removed, the balance will be destroyed, but the other force may still exist. For example, when the rope is broken, the tension on the lamp disappears and the balance is destroyed, but the gravity on the lamp still exists
(5) the number of objects involved
a pair of interaction forces: only two objects are involved in the interaction, and two objects are the force exerting objects of one force and the force bearing objects of the other force at the same time. For example, the push force of people to cars and the force of cars to people only involve people and cars
a pair of balancing forces: it involves three objects, two of which exert forces on the other. For example, the balance force of gravity and supporting force on a book on a horizontal table is exerted by the earth on the book and the table on the book, involving three objects: the book, the earth and the table
(6) resultant force
a pair of interaction forces: because the interaction forces act on different objects, they cannot be synthesized. A pair of balancing forces: the resultant force is zero
(7) work
a pair of interaction forces: the work done should be calculated according to the actual situation of each force. Each of them does not necessarily do the same work
a pair of balance forces: the work done by the two forces is the same, but the effect is opposite (one positive and one negative), which counteracts each other, that is, the work done by the combined forces is zero.
(1) the point of action of the force:
a pair of interaction forces: acting on two different objects respectively
for example, the pulling force of the rope to the lamp and the pulling force of the lamp to the rope are a pair of interaction forces, the former acting point is on the lamp, and the latter acting point is on the rope
a pair of balancing forces: acting on the same object
for example, the pull of the rope on the lamp and the gravity of the earth on the lamp are a pair of balance forces, and their action points are all on the lamp
[2] the nature of forces
a pair of interaction forces: they must be forces of the same nature
they are gravity, elasticity or friction. For example, when people push cars, the forward force of people on cars and the backward force of cars on people are a pair of interactive forces, which are elastic in nature
a pair of equilibrium forces: the nature of the forces is not necessarily the same
for example, the gravity and supporting force on an object on a horizontal table are a pair of balance forces. The nature of gravity is gravity, while the nature of supporting force is elasticity
[3] the effect proced
a pair of interaction forces: the effect proced by the action on different objects cannot offset each other. For example, the pull of the lamp to the rope and the pull of the rope to the lamp have different effects. The pull of the lamp to the rope will make the rope elongate, while the pull of the rope to the lamp will make the lamp not fall. These two effects cannot offset each other
a pair of balance forces: the effects proced by acting on the same object cancel each other. For example, a Book placed on a horizontal table is subject to a pair of balance forces of gravity and supporting force, and their effects counteract each other to keep the book still
[4] relationship with time
a pair of interaction forces: generated at the same time and disappeared at the same time, with instantaneous corresponding relationship. For example, when people push the car, the forward force and the backward force are proced at the same time. Once the cart is stopped, the force of the car on people disappears
there is no such instantaneous corresponding relationship between a pair of equilibrium forces. If one of the forces is removed, the balance will be destroyed, but the other force may still exist. For example, when the rope is broken, the tension on the lamp disappears and the balance is destroyed, but the gravity on the lamp still exists
(5) the number of objects involved
a pair of interaction forces: only two objects are involved in the interaction, and two objects are the force exerting objects of one force and the force bearing objects of the other force at the same time. For example, the push force of people to cars and the force of cars to people only involve people and cars
a pair of balancing forces: it involves three objects, two of which exert forces on the other. For example, the balance force of gravity and supporting force on a book on a horizontal table is exerted by the earth on the book and the table on the book, involving three objects: the book, the earth and the table
(6) resultant force
a pair of interaction forces: because the interaction forces act on different objects, they cannot be synthesized. A pair of balancing forces: the resultant force is zero
(7) work
a pair of interaction forces: the work done should be calculated according to the actual situation of each force. Each of them does not necessarily do the same work
a pair of balance forces: the work done by the two forces is the same, but the effect is opposite (one positive and one negative), which counteracts each other, that is, the work done by the combined forces is zero.
3. For example, pushing a static box on a horizontal plane, because the thrust is balanced with the static friction, and the gravity of the box is balanced with the plane supporting force, so the box is still in a static state. This can't mean that the box is not pushed. When a person stands with a heavy load, it doesn't fall because gravity is in balance with the force he carries. Can we say that the heavy load is not affected by the force? Is it not for nothing? Under the action of equilibrium force, it can only be considered that the resultant force of external force is zero.
4. Hello
it is ideal that the object is not forced
what happens when an object is not stressed? No one has seen it. Will there be inertia when the object is not forced? I personally take a negative attitude
so the balance force is not force
hope to help you, hope to adopt.
it is ideal that the object is not forced
what happens when an object is not stressed? No one has seen it. Will there be inertia when the object is not forced? I personally take a negative attitude
so the balance force is not force
hope to help you, hope to adopt.
5. Balance force acting on the same object
equal size
opposite direction
acting on the same line
understand< In short, the two forces cancel each other
equal size
opposite direction
acting on the same line
understand< In short, the two forces cancel each other
6. Unknown_Error
7. When a body is subjected to several forces, if it keeps still or moving in a straight line at a constant speed, these forces form a "balance force"
unknown questions.
unknown questions.
8. Unknown_Error
9.
2. The action time is different
1、 The object of action is different
1. Force and reaction force are two forces acting on two objects
The equilibrium force is two forces acting on the same object2. The action time is different
1. The acting force and non acting force are proced, changed and disappeared at the same time
However, the equilibrium force may not appear and disappear at the same time Three, the nature of the force is different
1, the force and the reaction force must be the same nature of the force
However, the equilibrium force is not necessarily of the same nature Four, the effect of different1, balance force is a number of forces acting on an object, the resultant force is zero, so that the object is in a state of balance, these forces are called balance force
The force and reaction force refer to the force exerted on an object10. Balance force: several forces acting on the same point with vector sum of 0 are a group of balance forces
to put it simply, for two forces, if they are equal in size and opposite in direction, acting on the same object, then the two forces are a pair of balanced forces. In junior high school, only one pair of balance force is investigated
a pair of balance forces always act on the same object and line
if the object is only affected by the balance force, it will keep still or moving in a straight line with uniform speed
deepen a little, if the resultant force of three forces acting on the same object is 0, then the three forces are a group of balanced forces... And so on, we can get the situation of four or more forces
force and reaction: when one object a exerts a force on another object B, object a must also be subjected to the force exerted by one object B. If the force exerted by object a is called force, then the force on a is called reaction
the force and the reaction force are equal in size and opposite in direction, acting on the same straight line, and they always proce, increase, decrease or disappear at the same time
forces and reactions always act on different objects separately!
to put it simply, for two forces, if they are equal in size and opposite in direction, acting on the same object, then the two forces are a pair of balanced forces. In junior high school, only one pair of balance force is investigated
a pair of balance forces always act on the same object and line
if the object is only affected by the balance force, it will keep still or moving in a straight line with uniform speed
deepen a little, if the resultant force of three forces acting on the same object is 0, then the three forces are a group of balanced forces... And so on, we can get the situation of four or more forces
force and reaction: when one object a exerts a force on another object B, object a must also be subjected to the force exerted by one object B. If the force exerted by object a is called force, then the force on a is called reaction
the force and the reaction force are equal in size and opposite in direction, acting on the same straight line, and they always proce, increase, decrease or disappear at the same time
forces and reactions always act on different objects separately!
Hot content