Motion

"He is going very fast. He is the fastest person in the world!

The train goes at the speed of 350 kilometers per hour.

Acceleration due to gravity g is 9.8 meters per second.                                                                      

The earth rotates itself at the speed of half kilometer per second. It is nearly equal to 800 km per hour.

The galaxies itself rotating at very high speed and also they exert linear motion. The motion of the galaxy is colossal."

All these are the lines connected with study of motion. We don’t need so much of introduction to these motions as it is everywhere around us. Everything in this universe are in motion. 

So the knowledge of motions can explain these many Natural phenomenons. That is why Mechanics is the root to know about our universe.

When dealing with physics, questions should be asked in a physical way and the answers should be given in a mathematical way on behalf of measurements.     

So, motion can be started with Physical questions:

The questions that arose in ancient time on dealing with motion are,

What is the meaning of motion?

What is really happening in a motion of an object?

What is the common thing that happens in all kind of motions?  

How it can be represented in a simple way?

In physics,

To learn about anything we should start from the simple things.

To learn it completely, we should finish with the difficult problems. 

So it was started from a simple way.

Visualization is the best way to analyze anything accurately.

So look at an example of simple visualization of motion.  

          Inner visualization of motion from X to Y with top angle and the path of motion seen 

                                               from 2D space of side wall ABEF.

                              Inner visualization of motion from X to Y with penetrative vision.

In the given above visualization I took a simple motion which happens in 3D space. For easiness it was depicted the shape of the space in a rectangular cuboid form. The motion starts from X and terminates at Y and it was depicted at various angles in space.

It can be addressed out a common thing from above visualizations and from the all of the motions around us that, a motion is “the change in orientation of the point in space with respect to time”.

An object is changing its location with respect to time. The change in location may take any way of direction in 3D space.  

The way how it moves is called the shape of the path. The path can be represented using diagrams. Orientation refers to the position of an object with respect to some reference point.

But the motion refers to the change in orientation and it is determined using the factors that depend on the orientation of the object.

It is impossible to define Motion without stating the orientation of any object, more precisely in space using mathematical factors and terms.  

      It is the reason how the Cartesian Co-ordinate System was first created in the 17th century by René Descartes to indicate the various orientations of any object.

Orientation of any object is illustrated in the simplest manner using the Cartesian Co-ordinate system where the positions are indicated, from a reference point “O” and from two perpendicular lines passing through this point “O”. The two perpendicular lines were called “the X and the Y axis, as it was chosen the horizontal is X axis and the vertical is Y axis”.

            In Cartesian Co-ordinate System, the Mathematical terms Functions and Sets were used

As we have already studied about these things in Mathematics, we can proceed further to Motions in Physics with some essential assumptions in the next post Kinematics And Its Assumption .