CONSERVATION LAWS

 In any physical phenomenon governed by several different forces, several quantities may change with time.However, some physical quantities remains constant in time.These quantities are the 'conserve quantities' of nature.This remarkable fact is the basis of many law called conservation laws.

There are nearly 14 conservation laws based on symmetry principle on Physics.And from those 14 laws discussion of some of the laws are given below:

  1.  Law of conservation of linear momentum 
  • If no external force acts on system of colliding objects, then the total momentum of the objects, in a given  direction before collision is equal to the total momentum of object in same direction after collision.
    2. Law of conservation of mass energy
  • when a body falls freely in vacuum under the effect of Earth's Gravity, the total mechanical energy (sum of kinetic and potential energy) remains constant. Both the kinetic and its potential energy change continuously with time.However the sum remains fixed. In this illustration the force of gravity is involved. The force of gravity is conservative force.






    3.Law of Conservation of Angular momentum
  • This law corresponds to the law of conservation of linear momentum.According to this law, if no external torque acts on a system, then the angular momentum of a system remains constant.
   4.Conservation of electric charge 
  • The total electric charge of an isolated system remains constant.

    5.Conservation of Baryons
  • The nucleus and hyperons have baryon number +1. Their anti particles have baryon number -1. This law says that total baryon number must remain unchanged.

    6.Conservation of Parity
  • This law holds for all strong and electromagnetic interaction but not for the weak interaction.



  • Author:Aadarsha Jha
#PHYSICSLOVER 




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