What are the causes of geostrophic deflection force? Explain with knowledge of physical mechanics 10

The deflection force of the earth's rotation (referred to as the geostrophic deflection force) refers to a force that deflects all objects on the earth that move horizontally due to the rotation of the earth. This kind of bias force of horizontal motion was first studied and determined by the French mathematician Coriolis, so it is also called Coriolis force.

In the case of the Northern Hemisphere, taking the polar plane as an example, the angular velocity of the polar plane is the angular velocity of the polar plane due to the rotation of the earth causing a counterclockwise rotation around its vertical axis. When an object moves relative to the polar ground, the observer standing on the ground will feel that the object is acting on a force parallel to the ground plane, which is called the horizontal geostrophic deflection force. Taking the equatorial plane as an example, at the equator, the plane tangent to any point above it rotates around an axis that passes through this point parallel to the Earth's axis.

There is only angular velocity in the horizontal direction. As the Earth rotates, the eastern side of the equatorial plane "descends" and the western side "rises". If an object moves relative to the earth's plane, the observer on the earth feels that the object moving to the east is affected by an upward force, while the object moving west is affected by the downward force.

Therefore, it is believed that an object moving in the equatorial plane is only affected by a perpendicular force, which is the perpendicular geostrophic deflection force.

At various latitudes between the equator and the polar regions, the Earth's rotation causes the Earth's ground level to rotate everywhere. This rotation can be decomposed into a rotation about a vertical axis (equivalent to the polar plane) and a rotation about a horizontal axis (equivalent to the equatorial plane). The angular velocity of the ground rotation has components in both vertical and horizontal directions.

So, if the object is to be acted on in both vertical and horizontal directions. Therefore, it is believed that objects moving in the middle latitudes are subject to both horizontal and vertical geostrophic deflection forces.

It's actually not difficult to explain, it depends on whether you understand it or not. Finally, there is another sentence, it is an inertial force.

It is easy to remember that "the northern hemisphere is biased to the right, the southern hemisphere is biased to the left", and the equator is not biased, which is due to the rotation of the earth. Features: From red to the poles, it gradually grows!

The force that occurs because of the rotation of the earth with the earth's graticule as the frame of reference. Geostrophic deflection is a component of the Coriolis force (Coriolis force) along the Earth's surface, expressed as f=2mv sin, in order to maintain horizontal inertial motion of the object, the graticule generates relative acceleration due to the rotation of the Earth. First of all, it should be noted that the geostrophic deflection force to the right is in the northern hemisphere, and in the southern hemisphere it is to the left, of course, these right and left are relative to the direction of progress, and the following is the situation in the northern hemisphere.

1.Since the angular velocity of each latitude is the same, when flying from north to south, the circle of the south is large, so the linear velocity is large, so a small linear velocity in the north is slower than the linear velocity of the south, so it deviates to the right due to inertia. It's the same with going north, from a fast place to a slow place, the speed is 'ahead', and the direction of progress is also deviated to the right.

2.Fly along the latitude to the east and west, at this time, because the direction of gravity points to the center of the earth, and the direction of the latitude circle points to the center of the circle is not the center of the earth, you can think about it, so because of this angle, the centripetal force can not completely cancel out the centrifugal force that you rotate around the center of the circle of the parallel, so a synthesis, it will also deviate to the right. 3.

The equator is not subject to geostrophic deflection precisely because the center of the earth is exactly the center of the circle in which the latitudinal circle rotates, and the two coincide, and gravity can cancel out the outward force. Finally, the geostrophic deflection force is greatest at the north and south poles.

1. When the object moves relative to the earth's surface, it will be affected by a force called the geostrophic deflection force and change its direction, but the geostrophic deflection force is not a real force, but an inertial force.

2. The geostrophic deflection force is a force perpendicular to the direction of motion on the earth's surface due to the rotation of the earth. The full name is the Earth's rotational deflection force. The geostrophic deflection force does not change the velocity (magnitude of velocity) of a moving object on the earth's surface, but it can change the direction of a moving object.

Geostrophic deflection forces have obvious effects on monsoon circulation, air mass movements, cyclone (typhoon) and anticyclone (cold air) migration paths, ocean currents and river movements, and many other natural phenomena.

3. Since the angular velocity of each latitude is the same except for the north and south poles, when flying from north to south, the circle of the south is large, that is, the longer the latitude line is to the south, so the linear velocity is large.

Therefore, a small linear velocity in the north is slower than the linear velocity in the south, so it deviates to the right due to inertia. It's the same with going north, from a fast place to a slow place, the speed is 'ahead', and the direction of progress is also deviated to the right.

To determine the geostrophic deflection force, the face needs to be oriented towards the direction of the object's motion, with the northern hemisphere deflecting to the right-hand direction and the southern hemisphere deflecting to the left-hand direction. It can also be judged by the rule of the left and right hands: four fingers together, palms facing up, four fingers pointing in the direction of the object's special motion, and thumb pointing in the direction of deflection force.

The northern hemisphere is right-handed, and the southern hemisphere is left-handed. The geostrophic deflection force is always perpendicular to the direction of motion of the object.

Your second question, first of all, we imagine that in a large disk (which can also be thought of as the knowing section of the earth) rotates from west to east along the center, and we go straight out from the center of the circle, will we deviate to the west (that is, the reverse direction of rotation), this is because the linear velocity of our original circle at the center of the circle is relatively small, and when we go out, our linear velocity cannot keep up with the linear velocity of the outer part of the disk, and if the velocity cannot keep up with us, we will lag behind the outer disk, and we will deviate westward, and the same can be used for the rotation of the earth. Follow-up: Too professional to understand.

It would be nice if it was more popular. And why is it not biased on the equator: Since you can't understand this method, let's use the physical force analysis, here you forget the previous ones, first of all, the gravity of people is directed to the center of the earth, and the earth rotates, and people also rotate to produce a centripetal force, the centripetal force is directed to the center of the circle of latitude where we are, and the powerful synthesis will have an additional component, this component is the geostrophic deflection force, in the northern hemisphere this force is directed south, first of all, you first look at the object moving from west to east, Because of the existence of this force, it will deviate to the right, and the object moving from north to south, you think about adding a slow object to a fast-moving object, then will this added object deviate a little later, as for the equator, the center of the circle coincides with the center of the centripetal force, there is no component force, and there is no geostrophic deflection force Understood? Oh.