When we observer in everyday life, we see many things are in motion. We see birds fly in the air, they are in motion. We see bus, car , bicycle etc. all are in motion. Even the sun, moon and stars are in motion. According to science, if we have to define motion. We can say that motion is the change in position of an object with respect to its surrounding in a given interval of time.

Types of Motion:

i. Transitional :

It is a type of motion, where an object moves along a path in any of the three dimension.

ii. Rotational :

It is a type of Motion , where an object moves along a circular path in a fixed axis.

iii. Linear :

It is similar to transition motion, where an object moves in a single direction along a single dimension.

iv. Periodic :

A motion that repeat itself after a certain interval of time.

v. Simple Harmonic :

It is a special type of Periodic Motion where the restoring force on the moving object is directly proportional to the objects displacement magnitude and acts towards the objects equilibrium position.

vi. Projectile :

A motion with both Horizontal and vertical displacement.

vii. Oscillatory Motion :

It is a repetitive motion within a given time frame. Same motion in Mechanical nature is called vibration.

There are 3 Laws of Motion :

(i) First Law :

First Law of Motion states that an object will tend to remain in its existing state of rest or motion, unless external force acts on it to change its existing state.

(ii) Second Law :

Second Law of Motion states that the acceleration of an object is directly proportional to the force applied on the object. And inversely proportional to the mass of the object.

The mathematical equation of second law of motion is:

F = ma , a = F / m , m = F/a
where, F = Force, m = mass, a = acceleration

(iii) Third Law :

For every action, there is an equal and opposite reaction.

Equation is : F_A = − F_B