Question

which is the correct statement from this list

mass is the amount of matter contained in an object
ii) kilogram weight is a unit of mass
iii) at the center of the earth the mass and weight of objects are equal​

Answer 1

Answer:

The correct answer will be (ii)

Explanation:

As unit of mass is kilogram in SI while gram in CGS.

While the options (i) and (iii) will be incorrect, as "mass is the measure of the amount of matter containsed in an object", and "at the center of the earth the mass and weight of objects will be unequal as mass is the measure of amount of matter in an object while weight is the measure of final mass of the object when a gravitational force acts on the object".

You can understand the difference between mass and weight by the following example :

Let there be an object with a mass of 10 kilogram and the earth's gravitational force be acting on it.

So, the mass of the object = 10 kilogram

gravitational force (g) acting on the object

= 9.8 m/s^2

[proved from scientific calculations]

Therefore,

Weight of the object = mass of object x g

= 10 kg x 9.8 m/s^2

= 98 kg m/s^2

= 98 N

Remember "weight of an object" always has the unit "Newton (N)"

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