IIT JEE , AIEEE Forum - Physics , Mechanics

h_push17@rediffmail.com

why any substance has mass

ashish_banga

see below

djdylan2000

No ashish_banga.

What you are talking about is weight.

Mass is inertia. It is independent of gravity.

ganesha1991

because it has matter

ASHISH mass has nothing to do with gravity
djdylan is right what u r talking about is weight

edison

Mass is something which is intrinsic property of a matter.

So any form of matter whether solid, liquid or gas has mass.

Just like charge is required for electric force of attraction/repulsion

Magnetic Poles for Magnetic interaction

We have mass for gravitational interaction.

Nothing more can be explained beyond this or we can say that by virtue of matter having mass is responsible for the Physical world around us, for the entire solar system and Universe as well as the force binding it is nothing both Gravitational which originates due to mass.

mujtaba4iit

Yes it is because substances are matter.
And matter is defined as any solid liquid or gas which has mass and occupies space.

chemicaltester

why any substance have mass
thats due to potential energy stored in it
use einstein uncle formulae
u will se that mass is another form of energy
mass being an inteinsic property depends upon matter in it

Ndmancer

Ndmancer

it's true any matter has mass...that's what they say.

but what is the real definition of mass?

mass is just a krazzy number used to quantify the amount of substance contained in a substance...(feynman style..)

that was the old notion till they found out the mass energy equivalence.

still it's accurate and convenient to use mass.

to phrase things this way:try using any of the laws of motion without mass;theyr'e like Romeo and Juliet.

ashish_banga

Mass is the quantity of inertia possessed by an object or the proportion between force and acceleration referred to in Newton's Second Law of Motion.

This is not a very good operational definition of mass, of course. In most common instances, mass is determined by weighing the object and using the force of gravity to calculate the value automatically - which is why you can get on a scale and have read your mass.

The SI unit of mass is the kilogram (kg).

Because of the relationship between weight and mass, these concepts are frequently confused. You can, in fact, convert exactly between weight and mass on the Earth's surface. This confusion is heightened by the fact that in much of metric world, weight is not dealt with, and mass is used in its place almost exclusively. The main difference is that if you were to leave the Earth and go to the Moon, your weight would change but your mass would remain constant.

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