[Physics] General Scientific Laws - TNPSC Physics Study Materials

General Scientific Laws

1. Newton's First Law of Motion [Law of Inertia / Law of Galileo]

Every object continues to be in its state of rest or of uniform motion in a straight line unless acted upon by an external force.

2. Newton's Second Law of Motion

The Force applied on a body is equal to the product of the mass of the of the body (m) and the acceleration (a) produced by the body.

F = ma

3. Newton's Third Law of Motion

For every action there is an equal and opposite reaction.

Examples: Swimming, Bullet, Rocket, etc., 

4. Newton's Law of Universal Gravitation

Any two bodies in the universe attracts each other body with a force 'F' that is directly proportional to the product of their masses (m1 x m2) and inversely proportional to the square of the distance (d) between them.

          F = G (m1 x m2) / d^2

5. Law of conservation of Energy.  

The total energy in an isolated system remains constant. The energy can neither be created nor be destroyed but it can be transformed from one form to another form.

6. Pascal's Law

The pressure applied anywhere in a confined incompressible fluid is transmitted equally in directions throughout the fluid.

 7. Law of Reflection of Light

1. The angle of incidence is equal to the angle of reflection

2. The incident ray, the reflected ray and the normal at the point of incidence all lie on the same plane.

8. Ohm's law
9. Kirchoff's Law 
10. Archimedes Principle
11. Pascal's Law 
12. Stephen's Law