Science (from Latin scientia) meaning "knowledge" is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. In an older and closely related meaning, "science" also refers to a body of knowledge itself, of the type that can be rationally explained and reliably applied. A practitioner of science is known as a scientist.

Branches of Science :

I.Newton's First Law of Motion:

 Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. 

II.Newton's Second Law of Motion: 

 The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.  

III.Newton's Third Law of Motion:

 For every action there is an equal and opposite reaction.  

 

Newton's Law of Gravity:

 where:

    F is the force between the masses,

    G is the gravitational constant,

    m1 is the first mass,

    m2 is the second mass, and

    r is the distance between the centers of the masses.