If we want to state these interactions with regards to physics, we call it as motion.
If an object is moving, we could be curious to understand what are the things taking place that make a body move, how long will a body move and numerous other things.
To know that we will study the topic of motion.
A motion diagram for an item whose acceleration points opposite the velocity, the magnitude of the velocity reduces as these progress.
The following are the terms that should be studied before coping with motion:
Motion: When the body changes its position with respect to the surroundings, the body is said to be in motion.
Example: Considering Sun as reference point, planets change its position, so, planets are in motion
Rest: When the body does not change its position with respect to the surroundings, the body is said to be at rest.
Example: A person, sitting inside a moving bus, is at rest with respect to the person sitting next to him as he is not changing his position.
The types of motion are:
Non uniform motion
A) Non Uniform motion: When unequal distances are covered in equivalent interval of time, the motion is considered in non uniform motion. The bodies performing non uniform motion have different speed or velocity.
B) Uniform motion: When the same distance is covered in the same interval of time, the motion is considered in uniform motion.
The bodies moving with continual speed or velocity have uniform motion or improve at the uniform rate.
We can even classify motion into three types:
In Rotatory motion, the particles of the body explain concentric circles about the axis of motion.
In Translatory motion, the particle moves from one point in space to other. This motion may be along a straight line or along a curved path.
They can be classified as:
Motion along a straight line is called rectilinear motion.
Motion along a curved path is called curvilinear motion.
In Vibratory motion, the particles move to and fro about a fixed point.
Linear motion also known as rectilinear motion is motion with a straight line and can be explained mathematically only using 1 spatial dimension. The linear motion can be of 2 types: non uniform linear motion having non-zero acceleration or variable velocity; uniform linear motion with zero acceleration or continual velocity. The motion of a particle with a line can be explained by its position x, which differs with t (time). An example of linear motion is a player running 100m with a straight track.
Linear motion is the most fundamental of all motion. Based on Newton's first law of motion, things that do not experience any net force will carry on to move in a straight line along a constant velocity till they are subjected to a net force. Under daily circumstances, exterior forces for example friction and gravity can cause an item to change the direction of its motion, so that its motion cannot be explained as linear.