Ask about the geostrophic deflection force and the causes of the geostrophic deflection force

Of course, the geostrophic deflection force should be considered in this problem, and the missile is launched northward along the east longitude 160, and the missile is in horizontal motion, so of course it belongs to the geostrophic deflection force in the horizontal direction.

As for the direction of inclination, the first thing to correct is that at the 160th meridian of east longitude, to the east is the western hemisphere, and to the west is the eastern hemisphere. The answer to this question is the Eastern Hemisphere, so the missiles are tilted to the west rather than to the east

The missile launch point is in the southern hemisphere, and it is to the north, according to the principle of "south, left, north right" in the direction of the horizontal rotation deflection force, the object moving to the north will deviate to the west, so the missile will deviate to the west, and the landing point must be in the eastern hemisphere.

Speaking of the travel distance, the distance between the latitude line and the equator at 28 degrees south latitude is 111*28=3108 kilometers, which is much greater than the range of 300 kilometers, so the landing point should still be in the southern hemisphere; And because 28 degrees south latitude is already at the low latitude of the southern hemisphere (latitude is lower than 30 south latitude), and the missile has not crossed the equator, the landing point should still be at the low latitude of the southern hemisphere.

In summary, the landing point should be at the low latitudes of the Eastern Hemisphere and the Southern Hemisphere. I did the math, about south latitude, west of 160 east longitude. The solution is complete

This question is a classic question of physical geography and has a certain reference value, but if you look at it according to the standards of the college entrance examination, the difficulty is not enough.

As far as the topic is concerned, the geostrophic deflection force should be taken into account.

In longitude, one degree is about 110 km. The range to the north is 300 km, which means that the missile is probably landing near 25 degrees south latitude (which is a low latitude area), or in the southern hemisphere.

The Southern Hemisphere is biased to the left, i.e., to the west. It falls 160 degrees east longitude to the west, so it belongs to the eastern hemisphere.

If the geostrophic deflection force is not taken into account, the missile will fall on the longitude of 160 degrees east longitude. It still belongs to the Eastern Hemisphere.

Longitude 160°E, latitude 28°S (Eastern Hemisphere) along 160°E, to the left (north, right, south, left), close to the equator, that is, the low latitudes.

Imagine that when we launch a missile, the missile and the earth want to be stationary, that is to say, the missile and the earth have the same horizontal velocity from west to east (of course, this is only an ideal theoretical state when doing the problem, and it will definitely be deflected in the actual process, and there are many various influencing factors).

Causes of formation: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 larger, that is, the longer the parallel line is to the south, so the linear velocity is large, so the linear velocity of a small argument in the north is slower than the linear velocity of the south, so it deviates to the right due to inertia.

The same goes for the north, from the fast place to the slow place, the speed is "ahead", and the direction of progress is also deviated to the right.

Geostrophic deflection force is a force that causes a moving object on the earth's surface to experience a force perpendicular to the direction of its motion 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.

In layman's terms, the geostrophic deflection force is actually a branch of the inertial force. Just like when the car starts or brakes, if there is a small ball in the car, the ball will be subjected to the inertial force in the horizontal direction and move back and forth in the horizontal direction.

It's just that the "cart" of the earth is spherical, and its frame of reference is spherical and has angular velocity, so the force on a horizontally moving object is more complicated and difficult to understand.

The geostrophic deflection force is a Coriolis force that is an equivalent force that we add to the moving object when the frame of reference we are acting has angular velocity.

Let's take the Northern Hemisphere as an example and divide it into two sections:

1 When you fly from north to south, because the earth rotates, we know that the angular velocity is the same in each place, but the radius of the circular section is different, and the long radius is the long linear velocity, which is very basic physical knowledge, the linear velocity of the north is slower than that of the south, and it needs to be accelerated in the east-west direction, so the inertia deviates to the right, and the right deviation is in the direction from north to south.

2 For the same reason, when moving from south to north, the speed of the south is faster than that of the north, which is equivalent to slowing down in the east-west direction, so the inertia also shifts to the right.

The geostrophic deflection force, or the deflection force of the earth, is a manifestation of the inertia of the motion of an object produced by the rotation of the earth, and is not a real force.

Principle: The object moves with the earth turning eastward, and the velocity (linear velocity) is different at different latitudes, and the higher the latitude, the lower the velocity. When an object moves to different latitudes of the earth, it is a relative motion to maintain its original velocity due to inertia.

In the mechanical model, the force corresponding to this relative motion is the deflection force of the earth.

For example, in the Northern Hemisphere, the southerly air current, due to inertia, maintains a low eastward velocity, forming a movement that is both southerly and relatively westward, i.e., northeasterly. To use the hand to make a gesture is to deviate to the right when moving forward.

The northerly airflow, which maintains a high eastward velocity due to inertia, forms a movement that is both northward and relatively eastward, that is, southwesterly. Using the hand to make a gesture is also to the right when moving forward.

Therefore, it is said that objects moving in the Northern Hemisphere will be deflected to the right due to the deflection force of the Earth.

In the Southern Hemisphere, on the contrary, moving objects will deflect to the left due to the deflection force of the Earth.