At the equator, the centripetal force is the greatest, is there still gravity?

There is gravity, and then gravity is equal to the gravitational force of the earth, and it completely provides the centripetal force.

m is at the equator, the centripetal force is the largest, and there is gravity mg, centripetal force f=mw 2*r, the radius of the earth r= m, the earth's angular velocity w=2 (24*3600) rad s, g=, it can be seen that mw 2*r is far less than mg, so the centripetal force f=mw 2*r can be ignored, and it is roughly believed that gravity is about equal to gravitational force.

Gravity is the resultant force of gravitational force and inertial centrifugal force. The centripetal force is equal to the inertial centrifugal force, and since the angular velocity of the earth is finite and is about =, the inertial centrifugal acceleration a=- r=, so the gravitational acceleration g at the equator'=gm r +a=g+a= This shows that the gravitational acceleration at the equator is almost equal to the gravitational acceleration of the Earth. (The mass of the Earth is calculated using the currently accepted kg, the radius of the Earth is km, and g is used as n·m 2 kg 2).

Without gravity, people fly out... It is a part of the gravitational force that acts as the centripetal force (gravity).

The gravitational force and centripetal force on the object.

All due to the gravitational pull of the earth on the object.

and generated. Due to the rotation of the Earth.

Therefore, except for the north and south poles, the gravitational force of any object on the earth's upward section is less than the gravitational force, which is due to the fact that part of the gravitational force provides the centripetal force of the object.

Of course, the equator is no exception, where the direction of gravity, gravitational force and centripetal force is in a straight line.

And gravity + centripetal force = gravitational force.

There is a simple and easy-to-understand method for reference: when an object is placed on the ground (it is not affected by other objects), gravity is usually considered to be equal to the supporting force.

On the equatorial ground, the force experienced by an object is gravitational attraction.

Supporting force (at this point don't say there is gravity), the weight of the balance rotates with the earth.

Centripetal force required.

f to f 10,000 f branches, and the size of f branches is equal to the magnitude of gravity, so the gravitational force is equal to the centripetal force.

Note: Gravity is actually a part of the universal gravitational force, which is balanced with the supporting force, and the other part acts as a centripetal force.

The gravity of the poles is greater than that of the equator, and g is the smallest at the equator, g=; At the poles g is maximum, g = .

Due to the rotation of the earth itself, except for the poles, objects in other places on the ground are moving in an approximate uniform circle around the earth's axis along with the earth, which requires a centripetal force directed vertically to the earth's axis, which can only be provided by the gravitational force of the earth on the object.

We can decompose the gravitational force of the earth on the object into two components, one component f1, which is directed towards the earth's axis, and the magnitude is equal to the centripetal force required for the object to move in an approximately uniform circular motion around the earth's axis; The other component, g, is the gravitational force on the object. where f1 = mrw 2 (w is the angular velocity of the earth's rotation and r is the radius of rotation of the object), it can be seen that the magnitude of f1 is zero at the poles, increases with the decrease of latitude, and is the maximum f1max in the equatorial region.

I know what you're trying to ask, but you may have misunderstood a little. "How does gravity divide a force that is in the same direction as it and a force that is not in the same direction as it", as you said, a force cannot be broken down in this way. In fact, except for the poles and the equator.

The direction of gravity, centripetal force, gravitational force is not the same. If it is at the poles, then there is no centripetal force, that is, gravity is equal to centripetal force. Whereas, if it is at the equator, then the gravitational force of the centripetal force, the direction of the three forces is in the same straight line.

And if it's not at the pole and the equator, then gravity is still equal to gravity, centripetal force, but it's a vector. Look at it this way: gravity is always directed at the center of the earth, and this does not change.

Whereas, the centripetal force points to the center of the circle moving in a circular motion. And the center of the circle of the circular motion of the object at a certain latitude due to its rotation is not at the center of the earth (if it is at the equator, then the center of the circle coincides with the center of the earth). So the centripetal force of an object at a certain latitude (except the equator) is not directed towards the center of the earth.

Gravity is the vector sum of these two forces, so it does not point to the center of the earth. But in general, because this centripetal force is very small, we usually ignore it and think that gravity is in the same direction as the centripetal force. Hope the above helps you understand!

5 The difference and connection between the gravitational force and gravity experienced by the object on the ground The gravitational force of the earth on the object is the fundamental reason why the object has gravity But gravity is not completely equal to gravity This is because the earth is constantly rotating, and 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, and its magnitude is , 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 comes from**? It can only come from the gravitational force f of the earth on the object, it is a component of the gravitational force f as shown in the figure on the right, and the other component of the gravitational force f is the gravitational force of the object mg At different latitudes, the angular velocity of the object doing uniform circular motion is the same, while the radius r of the circumference is different, this radius is the largest at the equator and the smallest (equal to zero) at the poles The centripetal force required for the object to rotate with the earth at latitude (r is the radius of the earth), it can be seen from the formula that as the latitude increases, the centripetal force will decrease, rcos 0, f 0 at the poles As another component of gravity, gravity increases with latitude At the equator, the gravitational force of an object is equal to the difference between gravitational and centripetal forces i.e. at the poles, gravity is gravity But since the angular velocity of the Earth is very small, only on the order of 10 5rad s, the difference between mg and f is not very large The gravitational force of objects on the surface of the Earth without taking into account the rotation of the Earth This is a very useful conclusion

Gravitation is determined by the relative position of two objects, and there is a gravitational force between any two objects. For objects on the surface of the Earth, both centripetal and gravitational forces are components of the gravitational force provided by the Earth. The centripetal force causes the object to rotate with the earth, and if the earth is no longer rotating, the earth no longer provides centripetal force to the object on its surface.

Gravity gravitational force centripetal force. Its function is to make the object move towards the center of the earth. Of course, gravity on the surface of the earth is not exactly the same as gravity, but because the centripetal force is small, it can be considered equal in general calculations, but it is definitely different.

Gravitational force is the same everywhere on the earth's surface, gravity is the gravitational force left after the centripetal force provided for circular motion (the direction is perpendicular to the horizontal downward side, that is, vertically downward), and the support force is the reaction force of the object to the pressure on the contact surface, and its magnitude is determined by the magnitude of the pressure.

Range. The centripetal acceleration of an object at the equator is much less than the acceleration of the specific force.

The gravitational pull of the Earth on an object at the equator is equal to the sum of centripetal acceleration and gravitational acceleration multiplied by the mass of the object.

i.e. gmm r =m·an+mg

There is no small g in space, there is no gravity in space, g only refers to the acceleration of an object on the earth, in space such as the orbit of the moon is not g, it will be much smaller than due to the increase in radius.

The gravitational force always points to the center of the earth, the centripetal force points to the center of the circle that moves in a circular trajectory, and after the gravitational force is decomposed, part provides the centripetal force, and the rest is gravity. At the equator, the centripetal force is the same as the direction of gravity and gravity, so it is the same as gravity, and the gravitational force is equal to gravity plus centripetal force. When not on the equator, the centripetal force points to the center of circular motion, and the direction of gravity is different from the direction of gravitation, and I don't know where you said that gravitational force equals gravity equals centripetal force.

When an object is at the equator, gravity provides centripetal force and gravity!

When not at the equator, the gravitational component provides the centripetal force!

The first half of your sentence is right, and the second half is wrong.

For any and a mass object, no matter how far away they are, or how close they are, there is gravitational force between them, and there is gravitational force between them on the equator, but the gravitational force is too great, and the earth's rotation speed is too small, so the centripetal force is much less than the gravitational force, so the resultant force between the two forces is gravity. Due to the direction of the centripetal force of the object at the equator, the direction of the gravitational force is exactly in a straight line. So gravitational minus the centripetal force is gravity.

Since the direction of the centripetal force is always perpendicular to the earth's axis, there is an angle between the centripetal force and the gravitational force when it is not on the equator, and the centripetal force decreases towards the poles, there is no centripetal force at the north and south poles, only gravitational force, and at the north and south poles the gravitational force and gravitational force are equal.

Gravitational force: f=gmm r

Centripetal force: In the air: centripetal force = gravitational force.

On the ground: centripetal force = the gravitational force and the net force of the supporting force.

Gravity: Gravity = gravitational force of celestial bodies is not considered.

Consider the resultant force of the celestial body's self-gravity and centripetal force = gravitational force.

The gravitational force is equal to the gravitational force plus the centripetal force.

Here's a simple and easy-to-understand way to do this: when an object is placed on the ground (not affected by other objects), gravity is usually considered to be equal to the supporting force.

On the equatorial ground, the force experienced by the object is the gravitational force, the supporting force (at this time, don't say that there is gravity), the centripetal force required for the object to rotate with the earth f to f million f branches, and the size of f branches is equal to the magnitude of gravity, so the gravitational force is equal to the centripetal force gravity.

Note: Gravity is actually the part of the gravitational force, which balances with the supporting force, and the other part acts as the centripetal force.

In a simple earth system, gravity is the vertical downward force received by an object due to the attraction of the earth, and the reason why it receives the attraction of the earth is because of the existence of gravitational force. But gravitational force also provides the centripetal force that is required for people to rotate around the center of the earth. At the pole, it can be considered that gravity is gravity, and man does not rotate around the center of the earth, and in the general dimension, the centripetal force and gravity are at a certain angle, and their resultant force is gravitational force.

At the equator, the centripetal force is in the same direction as gravity, and the gravitational force at the equator is equal to the algebraic sum of the two forces.

Because, the equator will rotate, and the gravitational force is equal to the centripetal force, while the north and south poles do not rotate, the gravitational force is equal to the gravitational force, and there is no centripetal force. That's about it.