Editing Mass

[[Category: Physics]]
== Explanation ==
Mass of a system or a particle is the most interesting concept in physics that still doesn’t have a valid explanation. A broad explanation for mass is that it is a resistance of an object to any acceleration, according to the classical physics. It's generally known as the inertial mass or [[inertia]] and is represented as <math>{\vec{F}=m\vec{a}}</math>.

However, in [[special relativity]] the term [[relativistic mass]] comes into play, as mass is interchanged to [[energy]] and vice versa. This can be understood from the [[mass–energy equivalence]] formula <math>e=mc^2</math>. According to this, mass can be defined as an intrinsic property of the system of interest that arises from the [[kinetic energy|kinetic]] and [[binding energy|binding]] energies of the quarks along with the [[potential energy]]of the gluon field, which together make up the nucleons. Along with the interaction of other fields, mass manifests itself from the energy. And according to [[general relativity]] the presence of mass warps [[spacetime]] too. Now this ability of mass to curve spacetime is called as the [[gravitational mass]].

However, according to the [[equivalence principle]], the inertial mass and gravitational mass are the same. Which just means that when you are in a closed container and subjected to a constant gravitational field and then a constant acceleration, you cannot distinguish between either of them. The mass is generally expressed in terms of its SI unit as '''kilogram'''.

== Frequently Asked Questions ==
=== How is mass different from weight? ===
Weight is simply the [[force]] acting on an object of a certain mass that is subjected to [[gravity]]. On the other hand, mass is an intrinsic property fundamental to the object as explained above. Weight is related to mass as a multiple of local acceleration due to the gravity of the system the object is in – <math>{\vec{W}=m\vec{g}}</math>. Weight is measured in its SI unit as '''newton'''.