What is the Absolute Movement?

He Absolute movement Is the movement that does not depend on any external source acting on the moving object for its specific existence or nature.

In navigation, absolute motion is also a movement relative to a fixed point on the surface of the Earth or to some apparently fixed celestial point.

In physics, the absolute motion of an object is described by its measurements in a frame of reference that is preferred over other frames.

Remember that any change of place of an object or body means a movement. There are two types of movement: absolute movement and relative movement.

Movement can be defined as absolute when referring to a point that is still; For its part, a movement can be considered as relative when the reference point is moved at the same time.

That said, on planet Earth all movements are relative since there is nothing in the universe that can be defined as an absolute state of rest. Remember that the Earth itself moves on its own axis and also around the sun.

Absolute motion concept

It can be said that a movement is absolute or eternal when it refers to a point that is still.

Absolute motion is that which exists independently of any other relation or comparison, such as the mass of a body - which would be an absolute value because it does not depend on where it is.

The absolute character of the movement also implies rest, since this would be an essential condition for the development of the world.

For these reasons, absolute movement is considered a method of abstraction. The absolute movement is useful when thinking about a movement from a fixed reference system.

Examples of absolute motion

• If you see the sun from the planet Earth, the inhabitants of the planet are the ones that are moving around. But in spite of this, the movement of the sun is almost absolute in the daily life of life on Earth.

• If you observe an object falling, gravity will cause an absolute movement over the vessel that a person tripped over and causes the water to fall on the floor of the room. In this case it would not matter that with respect to the sun the glass would be mobilizing in a direction opposite to that which falls.

• If you observe the terrestrial translation by viewing it exclusively from the sun, regardless of whether the sun in turn is rotating around the center of a galaxy.

• If one observes the movement of a cyclist, from the point of view of a pedestrian waiting at the traffic light, it would be an absolute movement compared to its stillness.

• If you observe the movement of a bullet, the bullet would be considered as the moving object going towards its destination; Even though it is in motion (which it probably is) or if the weapon is moving as the product of the recoil of the shot.

• If you observe an object at rest in a fully controlled environment, you may notice that it remains in complete rest. However it is known that the tectonic plates located below the planet Earth never stop moving.

Differences between absolute motion and relative motion

On the other hand, relative motion refers to a movement of some other object or system. It is said to be relative because it must always refer to a particular referential system that is chosen by its observer.

Since several observers may have different references, it is considered important to relate observations made by them.

Two modes of relative motion can be considered: the relative motion between two particles in the same frame of reference, and the movement of a particle in two different frames of reference in movements but relative to each other.

When it comes to the movement of a particle in two reference frames, reference is made to the movement of a particle with respect to a reference system (xyz), which is called a relative reference with respect to another referential system (XYZ), which Is considered as an absolute referential.

The movement of one referential over another can be considered as a translation, a rotation, or a combination of both.

It should be remembered that a particle can be considered as moving in a reference point if its position with respect to it changes over time.

Examples of relative movement

• If a person runs from one car to another in a subway that is in motion: the person recedes in a subway that is advancing; This means that in reality does not regress, but neither advances, or both at the same time.

• If a person flies on a plane that moves in the opposite direction of the earth's rotation: this means that the planet Earth rotates and in turn the person with it, but at the same time the person would be heading in the opposite direction.

• If a person is on the platform of a train: the person can see the train moving in the station, but a person inside the train will see the platforms as if they were moving.

• If a rocket that goes into space moves away from the planet Earth that is moving away in its orbit: if it is seen from the planet Earth, it would be the rocket that is in movement, although the rocket is forming part of the planet orbital displacement. I would only leave the displacement until I abandon it completely.

References

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8. 20 examples of relative and absolute motion. Retrieved from examples.co.