Question

33. diffrence between
Mass and weight.​

Answer 1

Answer:

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Answer 2

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What is Mass?

It is one of the fundamental quantities in Physics and themost basic property of matter. We can define mass as the measure of the amount of matter in a body. The SI unit of mass is Kilogram (kg).

✰Note: The mass of a body does not change at any time. Only for certain extreme cases when a huge amount of energy is given or taken from a body. For example: in a nuclear reaction, tiny amount of matter is converted into a huge amount of energy, this reduces the mass of the substance.

What is Weight?

It is the measure of the force of gravity acting on a body.

The formula for weight is given by:

w = mg

✰Note: Shape of the earth is not completely spherical, but an oblate spheroid, therefore a person standing at the equator is far away from the center of the earth than a person standing at the north pole, as acceleration due to gravity is proportional to the inverse of the square of the distance between two objects, a person standing at the north pole would experience more weight as he is closer to the center of the earth than a person standing at the equator.

Relation Between Weight and Mass

Consider a body having large mass and large weight. Example of this situation is a large object which is hard to throw because the weight of this object is large.

Therefore, the relation between weight and mass can be derived with the help of Newton’s second law which explains that the free falling object has an acceleration “g” as the magnitude.

If an object with a mass of 1kg falls with an acceleration of 9.8 m.s, then the magnitude of the force is given as :

F = ma

= (1kg)(9.8m.s

= (9.8 kg.m.s

= 9.8N

Therefore, it can be concluded that the relation between weight and mass of an object with 1kg mass will have a weight of 9.8N.