Is gravity gravitational? Why? Relationship between gravity and gravitational force

The gravitational force you refer to should be gravitational force, which is the force of attraction that exists between two objects, and the magnitude of this force is proportional to the product of the mass of the two objects, and inversely proportional to the distance between the two objects.

That is to say, there is also a gravitational force between people and the earth, because the mass of the earth is relatively large, so the gravitational force is more obvious, this attraction we generally call gravity, logically speaking, from the principle that the force is reciprocal, gravity is a pair, but we generally do not consider the attraction of the object to the earth, only consider the attraction of the earth to the object, the direction of this force is directed to the center of the earth, this force is usually called gravity.

Gravitational force is not equal to gravity.

For example, a spacecraft orbiting in orbit is weightless with a gravity of 0. But the spacecraft is still subject to gravity, and if there is no gravity, it flies into space in a straight line, instead of orbiting the Earth.

When studying objects that are stationary or moving at low speeds on the earth relative to the ground, gravity and gravity are almost the same in magnitude and direction, and gravity can be regarded as gravity.

Gravitational force and gravity are not one and the same.

Gravitational force is not equal to gravity.

Gravitational force has a number of effects: 1. It provides the centripetal force of the object to rotate around the earth's axis.

2. Let the object press against the ground (gravity).

1. The difference between gravity and gravity is that gravity is the force that an object receives due to the attraction of the earth, which is called imitation gravity; Whereas, gravitational force is the force generated by the tendency of objects to accelerate closer to each other. And the direction of gravity is always straight downward, not necessarily towards the inner limb of the earth; And the direction of gravitational force is towards the center of the earth.

2. According to Newton's gravitational theorem, we know that the earth has a gravitational effect on the objects on it. Since objects on the earth have to rotate with the earth, they need centripetal force, which is provided by gravitational force. The component of the gravitational force of the earth on the object in the direction of the earth's axis provides the centripetal force, and the rest of the component force is what we call gravity.

It can be said that gravity is a component of gravity. But at the poles, the object does not rotate, so there is no need for centripetal force, and gravity is all used to generate gravity.

The gravitational pull of the earth on the surface of the earth for an object of mass m is f=gmm r, where m is the mass of the earth. Since the earth is constantly rotating, all objects on the earth are moving in a uniform circle around the earth's axis with the earth's rotation, which requires centripetal force, the direction of this centripetal force is perpendicular to the earth's axis, its magnitude is f=mr, where r is the distance between the object and the earth's axis, is the angular velocity of the earth's rotation. This centripetal force can only come from the gravitational force f of the earth on the object, which is a component of the gravitational force f, and the other component of the gravitational force f is the gravitational force mg experienced by the object.

Thus, the gravitational force mg is a component of the gravitational force f experienced by the object m as shown in the figure below.

The gravitational force exerted on an object is a component of the gravitational force.

Quantitative calculations show that at the surface, the difference between gravity g and gravitational f is not very large. Knowledge based on circular motion.

where is the angular velocity of the Earth's rotation.

r is the distance from the object to the earth's axis, let the dimension of the object be , then.

When =0, for an object with a mass of 1kg, the gravitational force experienced by it.

The difference in magnitude and direction between g and f citations is very small, so it is acceptable to assume that g and f citations are the same in calculations that are not particularly accurate.

Conclusion: According to Newton's gravitational theorem, we know that the Earth has a gravitational effect on the objects on it. Since objects on the earth are going to rotate with the earth, they need a centripetal force, which is provided by gravitational force.

The gravitational pull of the earth on the object provides the centripetal force to the component force in the direction of the earth's axis, and the remaining component force is what we call gravity. It can be said that gravity is a component of gravity, but at the poles the object does not rotate, so there is no need for a centripetal force, and gravity is all used to generate gravity.

Relation between gravitational force and gravity.

The importance of the "Law of Attraction" in our real society and attitude towards life.

There is a gravitational attraction between any two objects, and there is this attraction between any two objects. This attraction between objects is prevalent between all things in the universe and is called gravitational force.

Gravitational attraction is an interaction between objects due to their having the mass of holding cherry blossoms. Its size is related to the mass of the object and the distance between the two objects. The greater the mass of the object, the greater the gravitational pull between them; The farther apart the objects are, the smaller the gravitational force between them.

The gravitational force between two objects that can be regarded as particles can be calculated using the following formula: f gmm r 2, i.e. gravitational force is equal to the gravitational constant multiplied by the product of the masses of the two objects divided by the square of their distance. where g represents the gravitational constant, the value of which is about minus 11 units n·m2 kg2

It was measured by the British scientist Cavendish through a torsion scale experiment.

Whereas, gravity is also a type of gravitational force, which is the gravitational pull of the earth and objects on the earth.

Gravitational Force: What is Gravity?

Gravity itself is given by mass x gravitational acceleration.

It is affected by the gravitational field.

The force pointing to the center of the earth.

The point of action is on the center of gravity of the human body.

Gravitational attraction is the mass attraction present between any two objects.

f=gm1m2 r squared.

The magnitude of the Earth's gravitational pull is approximately that of gravity.

The point of action is on the surface of contact between man and the earth.

The direction is that the center of gravity of the person and the center of gravity of the earth are connected to the line pointing to the earth.

According to Newton's theorem of gravitation, we know that there is a gravitational attraction between all things, from celestial bodies to dust

Since the object on the earth is going to rotate with the earth, it needs a centripetal force The centripetal force is provided by the gravitational force The component of the gravitational force of the earth on the object in the direction of the earth's axis provides the centripetal force, and the rest of the force is what we call gravity

We can say that gravity is a component of gravitational force

Gravitational force is a type of gravitational force, and gravitational force contains gravity.

The gravitational pull between the Earth (or other stars) and an object in close proximity is called the gravitational force (the force that produces weight) on the object

For example, if a person's weight is mg, it means that the gravitational force between man and the earth is mg

When the object is fierce at the equator, because the centripetal force experienced by the object at this time is 0 at the angle between the equatorial plane, the gravitational force is equal to the gravitational force.

The law of universal gravitation, a law of interaction between objects, was discovered by Newton in 1687. There is a mutual attraction between any object, and the magnitude of this force is directly proportional to the mass of each object, and inversely proportional to the square of the distance between them.

The force exerted by an object that is lacking silver due to the attraction of the earth is called gravity. The object of gravity is the center of the earth. The direction of gravity is always straight downwards. The amount of gravitational force experienced by an object is directly proportional to the mass of the object.

I really don't have the face to stay any longer. Let's leave it at that. I hope that the next time we meet, we can have wine.

Gravity and gravity are not the same, gravity is just a component of gravity, see high school physics for details, I hope it can help you.

No, gravity is one component of gravitational force, and another component of gravitational force provides centripetal force.

The difference between gravity and gravity is complicated in detail. Gravity, the earth attracts you, and you attract the earth, it goes both ways. Gravity, the side of the force will certainly not be the Earth (hehe, a bit of a play concept, but it's a must).

On the other hand, you are standing on the earth, and the gravitational and gravitational forces are different in magnitude and direction. The direction of gravity is directed at the center of the Earth's sphere, and the magnitude can be calculated according to the formula of gravitational force. Gravity is verbose, the Earth is spinning, and it will "throw" you outward, and it doesn't matter if you throw it, you will become lighter (if the Earth spins fast enough, your gravity will go to zero).

With this throw, not only do you become lighter, but you draw an extension line along your body, and you no longer point to the center of the sphere, but should be a little north hemisphere (standing at the equator or the north and south poles, another matter). Don't worry, not only are you standing crooked, but the trees and buildings are not pointing to the center of the circle. In short, it is the rotation of the earth that is to blame.

According to Newton's gravitational theorem, we know that the earth has a gravitational force on the objects on it Since the objects on the earth are going to rotate with the earth, they need a centripetal force The centripetal force is provided by the gravitational force The component of the gravitational force of the earth on the object in the direction of the earth's axis provides the centripetal force, and the rest of the component force is what we call gravity

We can say that gravity is a component of gravitational force

But at the poles, the object does not rotate, so there is no need for centripetal force, and gravity is all used to generate gravity.

Answer: A

The first step is to determine the logical relationship between the question stems.

Gravity and gravity are two different "forces", the first two words belong to a juxtaposition relationship, and the first two words and the third word constitute a species relationship respectively.

The second step is to identify the options.

Item A: "Seaweed" and "lobster" are two different kinds of "seafood", the first two words belong to the juxtaposition relationship, and the first two words and the third word constitute a species relationship respectively, which is consistent with the logical relationship of the subject stem and conforms to it;

Item B: "Oxide" belongs to both "compound" and "pure substance", which constitutes a species relationship with the latter two words, which is inconsistent with the logical relationship of the subject stem and is excluded;

Item C: "Science" includes two branches, "Physics" and "Chemistry", but the order of words is inconsistent with the question stem, and the squire excludes it;

Item D: "Doctor" and "Doctor" belong to the cross-relationship, which is inconsistent with the logical relationship of the question stem, and is excluded.

So, choose option A.