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Motion

1

In physics, motion is a change in position of an object over time.

Time is the indefinite continued progress of existence and events that occur in apparently irreversible succession from the past through the present to the future.

Physics is the natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force.

Newton's 3 (three) Laws of Motion by makemegenius

2

Motion is described in terms of displacement, distance, velocity, acceleration, time and speed.

In everyday use and in kinematics, the speed of an object is the magnitude of its velocity ; it is thus a scalar quantity.

Distance is a numerical description of how far apart objects are.

Stop-Motion Parkour by Corridor

3

Motion of a body is observed by attaching a frame of reference to an observer and measuring the change in position of the body relative to that frame.

In physics, a frame of reference consists of an abstract coordinate system and the set of physical reference points that uniquely fix the coordinate system and standardize measurements.

4

If the position of a body is not changing with respect to a given frame of reference, the body is said to be at rest, motionless, immobile, stationary, or to have constant position.

5

An object's motion cannot change unless it is acted upon by a force, as described.

In physics, a force is any interaction that, when unopposed, will change the motion of an object.

6

Momentum is a quantity which is used for measuring motion of an object.

7

An object's momentum is directly related to the object's mass and velocity, and the total momentum of all objects in an isolated system does not change with time, as described by the law of conservation of momentum.

In classical mechanics, linear momentum, translational momentum, or simply momentum is the product of the mass and velocity of an object, quantified in kilogram-meters per second.

8

As there is no absolute frame of reference, absolute motion cannot be determined.

9

Thus, everything in the universe can be considered to be moving.

10

Motion applies to objects, bodies, and matter particles, to radiation, radiation fields and radiation particles, and to space, its curvature and space-time.

Before the 20th century, the term matter included ordinary matter composed of atoms and excluded other energy phenomena such as light or sound.

In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.

Space is the boundless three-dimensional extent in which objects and events have relative position and direction.

11

One can also speak of motion of shapes and boundaries.

12

So, the term motion in general signifies a continuous change in the configuration of a physical system.

13

For example, one can talk about motion of a wave or about motion of a quantum particle, where the configuration consists of probabilities of occupying specific positions.

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