Why the higher the latitude, the greater the gravitational force on the same object

The Earth is originally a flat sphere. In the universe, when a star is formed, it is difficult to form a pure sphere due to the gravitational pull of other stars. For example, the earth is a sphere with slightly flattened poles and a slightly bulging equator.

The Earth's equatorial radius is a kilometer and the polar radius is a kilometer, and this difference is so small that we don't notice it easily. To get back to the point, if the earth were flattened, the gravitational pull would be different at every point on the earth's surface, depending on the distance from the center of the earth. This makes the weight of an object of the same mass different at every point on the earth's surface.

This is the case with the current earth, because the poles are slightly flattened, so the poles are closest to the center of the earth and have the greatest gravitational pull, so a certain mass of matter is heavier here. Since the equator is slightly bulging, it is farther from the center of the earth, and the same mass of matter will be a little lighter here. There is an intellectual question about a merchant who bought a lot of herring in Holland, but when he arrived in a country near the equator, it was much lighter, because the gravitational pull was different in different parts of the earth.

The closer you are to the pole, the greater the weight, and the closer to the equator, the less the weight.

The higher the latitude, the slower the rotation and the greater the gravitational force.

Look, that part about gravity.

Gravity is the vector sum of the gravitational force and the centrifugal force. Towards the poles, the linear velocity of the Earth is low (or the angular velocity does not change, and the radius becomes smaller). Hey hey

The larger. The higher the latitude, the acceleration due to gravity.

The larger. The higher the height, the less gravitational acceleration!

As gravity is gravitational force.

One component of gravity, another component of gravitational force, provides the circular motion of the object around the earth's axis.

The centripetal force required.

The higher the geographical latitude of the object, the smaller the radius of the circular orbit, the smaller the centripetal force required, the gravitational force will increase, and the gravitational acceleration will also increase.

The relationship between the two:

According to Newton. The closer you are to the center of the Earth, the greater the gravitational acceleration, and the farther you are from the center of the Earth, the smaller the gravitational acceleration. The acceleration due to gravity of any object is the same at the same height in the same area.

The value of gravitational acceleration varies with altitude.

Increases and decreases.

When the height of an object from the ground is much less than the radius of the earth.

, the acceleration due to gravity does not change much. However, when the height above the ground is large, the value of gravitational acceleration g decreases significantly.

The higher the latitude, the greater the gravitational acceleration, because the higher the latitude, the closer it is to the center of the earth, and the closer it is, the greater the gravitational acceleration will be. This is due to the fact that the Earth is a special sphere, because the Earth's poles are slightly flattened, while the equator is slightly bulging, and correspondingly, the gravitational acceleration will also change accordingly.

The above content reference: Encyclopedia - Gravitational Acceleration.

On the equator. The acceleration due to gravity is approximately. And the gravitational acceleration at the poles is approximately.

With the higher the latitude, the gravitational acceleration is also greater, and the lowest latitude of the equator that we usually call is the smallest gravitational acceleration, because most of his gravitational force is used as the centripetal force of circular motion, so the gravitational force will be relatively small. At the poles, due to the high latitude, the centripetal force required for the corresponding object to move in a circular motion will also be very small, and the corresponding gravitational force mostly provides gravity. So in the places of the North and South Poles, the latitude is high, and the gravitational acceleration is large.

In junior high school physics, the gravitational acceleration will gradually decrease as the latitude increases, and there is such a change in the relationship.

The magnitude of the gravitational force of an object is independent of the first latitude in which it is located. True or False?

Hello, this sentence is wrong, the gravity of an object is related to latitude and height, the higher the latitude, the greater the gravity, the higher the altitude, the more the gravity is lacking, I hope my ability to help you, if you are satisfied, please give the link back a thumbs up, thank you. 殺

This statement is false, the magnitude of the gravity of an object is related to latitude and altitude, the higher the latitude, the greater the gravity, and the higher the altitude, the smaller the gravity.

Clarify the ** of gravity, know that gravity is a component of gravitation, according to the law of gravitation.

and centripetal force.

Knowledge analyzes the magnitude of gravity in relation to latitude and altitude. If rotation is ignored, gravity is independent of latitude; But the gravity still depends on the altitude, the higher the altitude, the smaller the gravity.

The point at which gravity works.

The position of the center of gravity is related to the geometry and mass distribution of the object. An object of regular shape and uniform mass distribution has its center of gravity at its geometric center, for example, the center of gravity of a rod of uniform thickness is at his midpoint; The center of gravity of the ball is in the center of the ball; The center of gravity of the square sheet is in two diagonals.

of the intersection. The gravitational force of the earth on an object seems to pull the object down from the center of gravity. If you use other objects to support the center of gravity, the object will be able to maintain balance. However, the position of the center of gravity is not the same, and the banquet is fixed on the object. It can be determined using the suspension method.

Categories: Education Science >> Admission >> College Entrance Examination Problem Description:

Is it related to centrifugal force?

Does it change when the magnetic field is abnormal?

Analysis: Because the earth is rotating, it will form an oblate sphere, and the equator will be longer than the meridian, so that the equator is farthest from the center of the earth at the equator, and relatively close to the center of the earth at the poles, so the gravity is different at different latitudes.

In addition, the generation of gravity is due to the action of gravity, the density of the earth's material distribution is also different, and the center of gravity is not necessarily in the geometric center, so there will be some deviations in gravity at different places at the same latitude. Including mountains, minerals will have an impact on gravity, and there are many factors.

The earth is rotating, and the objects on the earth also move in a circular motion with the earth, and the circular motion requires a centripetal force, and the magnitude of the centripetal force is related to the mass, radius, and angular velocity. Specifically, f=m*w2*r

The angular velocity is the same at any latitude on the earth, so the centripetal force is proportional to the radius of motion.

According to the definition of latitude. The greater the latitude, the smaller the radius of motion, and the smaller the centripetal force required. The centripetal force is provided by the component of the gravitational force of the object, and the gravitational force provides the centripetal force required for circular motion, and the rest is directly reflected in the gravitational acceleration, so what we call gravitational acceleration on the earth is related to the magnitude of latitude, and the larger the latitude, the greater the acceleration of free fall.

Hope it helps.

The gravitational force of an object is related to the gravitational pull of the earth and the object.

It is generally believed that 1The gravitational force is converted into gravity and the centripetal force required for rotation.

2.The Earth is spherical by default, and the gravitational pull is the same everywhere.

Centripetal force f= w 2 *r (w denotes the angular frequency and r denotes the distance from different points to the earth's axis!) Note, not the distance to the center of the earth).

It can be seen that w is fixed, and the higher the latitude, the smaller r and the smaller the corresponding f.

Thus, with the same gravitational force, the centripetal force f is small, and the gravitational force is large (the force can be decomposed with a triangle vector), and the gravity = gravitational force at the north and south poles reaches the maximum.